Section Linear Correlation and Regression. Copyright 2013, 2010, 2007, Pearson, Education, Inc.
|
|
- Alisha Hopkins
- 5 years ago
- Views:
Transcription
1 Section 13.7 Linear Correlation and Regression
2 What You Will Learn Linear Correlation Scatter Diagram Linear Regression Least Squares Line
3 Linear Correlation Linear correlation is used to determine whether there is a linear relationship between two quantities and, if so, how strong the relationship is
4 Linear Correlation Coefficient The linear correlation coefficient, r, is a unitless measure that describes the strength of the linear relationship between two variables. If the value is positive, as one variable increases, the other increases. If the value is negative, as one variable increases, the other decreases. The variable, r, will always be a value between 1 and 1 inclusive
5 Scatter Diagrams A visual aid used with correlation is the scatter diagram, a plot of points (bivariate data). The independent variable, x, generally is a quantity that can be controlled. The dependent variable, y, is the other variable
6 Scatter Diagrams The value of r is a measure of how far a set of points varies from a straight line. The greater the spread, the weaker the correlation and the closer the r value is to 0. The smaller the spread, the stronger the correlation and the closer the r value is to 1 or
7 Correlation
8 Correlation
9 Linear Correlation Coefficient The formula to calculate the correlation coefficient (r) is as follows. r = ( ( )( ) n xy) x y ( n x 2 ) x ( ) 2 n y 2 ( ) y ( )
10 Example 1: Number of Absences Versus Number of Defective Parts Egan Electronics provided the following daily records about the number of assembly line workers absent and the number of defective parts produced for 6 days. Determine the correlation coefficient between the number of workers absent and the number of defective parts produced
11 Example 1: Number of Absences Versus Number of Defective Parts
12 Example 1: Number of Absences Versus Number of Defective Parts Solution Here s the scatter diagram
13
14 Example 1: Number of Absences Versus Number of Defective Parts Solution Find r. r = ( ( )( ) n xy) x y ( n x 2 ) x ( ) 2 n y 2 ( ) y ( ) 2 r = ( ( ( ) 6 387) 17)106 ( ( ) 2 ( ( ) ) )
15 Example 1: Number of Absences Versus Number of Defective Parts Solution r = ( ( 6 75) ) 11,236 r = ,212 11,
16 Example 1: Number of Absences Versus Number of Defective Parts Solution r = Since the maximum possible value for r is 1.00, a correlation coefficient of is a strong, positive correlation. This result implies that, generally, the more assembly line workers absent, the more defective parts produced
17 Linear Regression Linear regression is the process of determining the linear relationship between two variables
18 Linear Regression The line of best fit (regression line or the least squares line) is the line such that the sum of the squares of the vertical distances from the line to the data points (on a scatter diagram) is a minimum
19 The Line of Best Fit The equation of the line of best fit is y = mx + b, where n ( xy ) x m = ( n x 2 ) x b = y m x n ( )( ) y, and ( ) 2 ( )
20 Example 3: The Line of Best Fit a) Use the data in Example 1 to find the equation of the line of best fit that relates the number of workers absent on an assembly line and the number of defective parts produced. b) Graph the equation of the line of best fit on a scatter diagram that illustrates the set of bivariate points
21 Example 3: The Line of Best Fit Solution From Example 1, we know that n ( xy ( )( ) ) x y m = n x 2 ( ) 2 ( ) x =
22 Example 3: The Line of Best Fit Solution Now, find the y-intercept, b. b = y m x = n ( ) ( )
23 Example 3: The Line of Best Fit Solution The equation of the line of best fit is y = mx + b y = 3.23x
24 Example 3: The Line of Best Fit Solution To graph y = 3.23x , plot at least two points and draw the graph. x y
25 Example 3: The Line of Best Fit x y
Chapter 12 Summarizing Bivariate Data Linear Regression and Correlation
Chapter 1 Summarizing Bivariate Data Linear Regression and Correlation This chapter introduces an important method for making inferences about a linear correlation (or relationship) between two variables,
More informationChapter 4 Describing the Relation between Two Variables
Chapter 4 Describing the Relation between Two Variables 4.1 Scatter Diagrams and Correlation The is the variable whose value can be explained by the value of the or. A is a graph that shows the relationship
More informationOverview. Overview. Overview. Specific Examples. General Examples. Bivariate Regression & Correlation
Bivariate Regression & Correlation Overview The Scatter Diagram Two Examples: Education & Prestige Correlation Coefficient Bivariate Linear Regression Line SPSS Output Interpretation Covariance ou already
More information8th Grade Math! 4th Quarter Pacing Guide LESSON PLANNING. Delivery Date
#8 Domain: Functions Standard: CC.8.F.4 Construct a function to model a linear relationship between two quantities. Determine the rate of change and initial value of the function from a description of
More informationx y
(a) The curve y = ax n, where a and n are constants, passes through the points (2.25, 27), (4, 64) and (6.25, p). Calculate the value of a, of n and of p. [5] (b) The mass, m grams, of a radioactive substance
More informationReteach 2-3. Graphing Linear Functions. 22 Holt Algebra 2. Name Date Class
-3 Graphing Linear Functions Use intercepts to sketch the graph of the function 3x 6y 1. The x-intercept is where the graph crosses the x-axis. To find the x-intercept, set y 0 and solve for x. 3x 6y 1
More informationCorrelation and Regression Theory 1) Multivariate Statistics
Correlation and Regression Theory 1) Multivariate Statistics What is a multivariate data set? How to statistically analyze this data set? Is there any kind of relationship between different variables in
More informationYear 10 Mathematics Semester 2 Bivariate Data Chapter 13
Year 10 Mathematics Semester 2 Bivariate Data Chapter 13 Why learn this? Observations of two or more variables are often recorded, for example, the heights and weights of individuals. Studying the data
More informationBIOSTATISTICS NURS 3324
Simple Linear Regression and Correlation Introduction Previously, our attention has been focused on one variable which we designated by x. Frequently, it is desirable to learn something about the relationship
More informationWORD: EXAMPLE(S): COUNTEREXAMPLE(S): EXAMPLE(S): COUNTEREXAMPLE(S): WORD: EXAMPLE(S): COUNTEREXAMPLE(S): EXAMPLE(S): COUNTEREXAMPLE(S): WORD:
Bivariate Data DEFINITION: In statistics, data sets using two variables. Scatter Plot DEFINITION: a bivariate graph with points plotted to show a possible relationship between the two sets of data. Positive
More informationGraphing Equations in Slope-Intercept Form 4.1. Positive Slope Negative Slope 0 slope No Slope
Slope-Intercept Form y = mx + b m = slope b = y-intercept Graphing Equations in Slope-Intercept Form 4.1 Positive Slope Negative Slope 0 slope No Slope Example 1 Write an equation in slope-intercept form
More informationChapter 12 - Part I: Correlation Analysis
ST coursework due Friday, April - Chapter - Part I: Correlation Analysis Textbook Assignment Page - # Page - #, Page - # Lab Assignment # (available on ST webpage) GOALS When you have completed this lecture,
More informationAPPENDIX 1 BASIC STATISTICS. Summarizing Data
1 APPENDIX 1 Figure A1.1: Normal Distribution BASIC STATISTICS The problem that we face in financial analysis today is not having too little information but too much. Making sense of large and often contradictory
More informationSummit Public Schools. Summit, New Jersey. Grade Level 8/ Content Area: Mathematics. Length of Course: Full Academic Year
Summit Public Schools Summit, New Jersey Grade Level 8/ Content Area: Mathematics Length of Course: Full Academic Year Curriculum: Foundations of Algebra Developed by: Colin Breivogel 207 Course Description:
More information+ Statistical Methods in
+ Statistical Methods in Practice STAT/MATH 3379 + Discovering Statistics 2nd Edition Daniel T. Larose Dr. A. B. W. Manage Associate Professor of Mathematics & Statistics Department of Mathematics & Statistics
More informationDescriptive Univariate Statistics and Bivariate Correlation
ESC 100 Exploring Engineering Descriptive Univariate Statistics and Bivariate Correlation Instructor: Sudhir Khetan, Ph.D. Wednesday/Friday, October 17/19, 2012 The Central Dogma of Statistics used to
More informationLearning Goals. 2. To be able to distinguish between a dependent and independent variable.
Learning Goals 1. To understand what a linear regression is. 2. To be able to distinguish between a dependent and independent variable. 3. To understand what the correlation coefficient measures. 4. To
More informationReminder: Univariate Data. Bivariate Data. Example: Puppy Weights. You weigh the pups and get these results: 2.5, 3.5, 3.3, 3.1, 2.6, 3.6, 2.
TP: To review Standard Deviation, Residual Plots, and Correlation Coefficients HW: Do a journal entry on each of the calculator tricks in this lesson. Lesson slides will be posted with notes. Do Now: Write
More informationChapte The McGraw-Hill Companies, Inc. All rights reserved.
12er12 Chapte Bivariate i Regression (Part 1) Bivariate Regression Visual Displays Begin the analysis of bivariate data (i.e., two variables) with a scatter plot. A scatter plot - displays each observed
More informationCORRELATION AND REGRESSION
CORRELATION AND REGRESSION CORRELATION The correlation coefficient is a number, between -1 and +1, which measures the strength of the relationship between two sets of data. The closer the correlation coefficient
More informationLecture 8 CORRELATION AND LINEAR REGRESSION
Announcements CBA5 open in exam mode - deadline midnight Friday! Question 2 on this week s exercises is a prize question. The first good attempt handed in to me by 12 midday this Friday will merit a prize...
More informationChapter 10 Correlation and Regression
Chapter 10 Correlation and Regression 10-1 Review and Preview 10-2 Correlation 10-3 Regression 10-4 Variation and Prediction Intervals 10-5 Multiple Regression 10-6 Modeling Copyright 2010, 2007, 2004
More informationChapter 6: Exploring Data: Relationships Lesson Plan
Chapter 6: Exploring Data: Relationships Lesson Plan For All Practical Purposes Displaying Relationships: Scatterplots Mathematical Literacy in Today s World, 9th ed. Making Predictions: Regression Line
More informationPredicted Y Scores. The symbol stands for a predicted Y score
REGRESSION 1 Linear Regression Linear regression is a statistical procedure that uses relationships to predict unknown Y scores based on the X scores from a correlated variable. 2 Predicted Y Scores Y
More informationChapter 1 Linear Equations and Graphs
Chapter 1 Linear Equations and Graphs Section R Linear Equations and Inequalities Important Terms, Symbols, Concepts 1.1. Linear Equations and Inequalities A first degree, or linear, equation in one variable
More informationMathematics: Essential Learning Expectations: 9 th -12th Grade:
Mathematics: Essential Learning Expectations: 9 th -12th Grade: Content Standard 1: Number Sense and Operation A student, applying reasoning and problem solving, will use number sense and operations to
More informationSlide 7.1. Theme 7. Correlation
Slide 7.1 Theme 7 Correlation Slide 7.2 Overview Researchers are often interested in exploring whether or not two variables are associated This lecture will consider Scatter plots Pearson correlation coefficient
More informationQuantitative Bivariate Data
Statistics 211 (L02) - Linear Regression Quantitative Bivariate Data Consider two quantitative variables, defined in the following way: X i - the observed value of Variable X from subject i, i = 1, 2,,
More informationGrade 8. Concepts and Procedures. The Number System. Expressions and Equations
Grade 8 Concepts and Procedures The Number System Target A: Know that there are numbers that are not rational and approximate them by rational numbers. identify pi as not rational, classify numbers as
More informationCREATED BY SHANNON MARTIN GRACEY 146 STATISTICS GUIDED NOTEBOOK/FOR USE WITH MARIO TRIOLA S TEXTBOOK ESSENTIALS OF STATISTICS, 3RD ED.
10.2 CORRELATION A correlation exists between two when the of one variable are somehow with the values of the other variable. EXPLORING THE DATA r = 1.00 r =.85 r = -.54 r = -.94 CREATED BY SHANNON MARTIN
More informationSix Sigma Black Belt Study Guides
Six Sigma Black Belt Study Guides 1 www.pmtutor.org Powered by POeT Solvers Limited. Analyze Correlation and Regression Analysis 2 www.pmtutor.org Powered by POeT Solvers Limited. Variables and relationships
More informationLesson 3-1: Solving Linear Systems by Graphing
For the past several weeks we ve been working with linear equations. We ve learned how to graph them and the three main forms they can take. Today we re going to begin considering what happens when we
More informationIntroduction to Spectroscopy: Analysis of Copper Ore
Introduction to Spectroscopy: Analysis of Copper Ore Using a Buret and Volumetric Flask: 2.06 ml of solution delivered 2.47 ml of solution delivered 50.00 ml Volumetric Flask Reading a buret: Burets are
More informationUGRC 120 Numeracy Skills
UGRC 120 Numeracy Skills Session 7 MEASURE OF LINEAR ASSOCIATION & RELATION Lecturer: Dr. Ezekiel N. N. Nortey/Mr. Enoch Nii Boi Quaye, Statistics Contact Information: ennortey@ug.edu.gh/enbquaye@ug.edu.gh
More informationBusiness Statistics. Lecture 10: Correlation and Linear Regression
Business Statistics Lecture 10: Correlation and Linear Regression Scatterplot A scatterplot shows the relationship between two quantitative variables measured on the same individuals. It displays the Form
More informationImportant note: Transcripts are not substitutes for textbook assignments. 1
In this lesson we will cover correlation and regression, two really common statistical analyses for quantitative (or continuous) data. Specially we will review how to organize the data, the importance
More informationPeriod: Date: Lesson 3B: Properties of Dilations and Equations of lines
Name: Period: Date: : Properties of Dilations and Equations of lines Learning Targets I can identify the properties of dilation mentioned as followed: dilation takes a line not passing through the center
More informationS1 Revision Notes: Regression
S1 Revision Notes: Regression Section 1: Calculating the regression line of y on x At GCSE you learnt to draw a line of best fit on a scatter graph. Regression is the area of statistics that enables you
More informationCHAPTER 4 DESCRIPTIVE MEASURES IN REGRESSION AND CORRELATION
STP 226 ELEMENTARY STATISTICS CHAPTER 4 DESCRIPTIVE MEASURES IN REGRESSION AND CORRELATION Linear Regression and correlation allows us to examine the relationship between two or more quantitative variables.
More informationChapter 5: Data Transformation
Chapter 5: Data Transformation The circle of transformations The x-squared transformation The log transformation The reciprocal transformation Regression analysis choosing the best transformation TEXT:
More informationCorrelation: basic properties.
Correlation: basic properties. 1 r xy 1 for all sets of paired data. The closer r xy is to ±1, the stronger the linear relationship between the x-data and y-data. If r xy = ±1 then there is a perfect linear
More informationregression analysis is a type of inferential statistics which tells us whether relationships between two or more variables exist
regression analysis is a type of inferential statistics which tells us whether relationships between two or more variables exist sales $ (y - dependent variable) advertising $ (x - independent variable)
More informationLecture (chapter 13): Association between variables measured at the interval-ratio level
Lecture (chapter 13): Association between variables measured at the interval-ratio level Ernesto F. L. Amaral April 9 11, 2018 Advanced Methods of Social Research (SOCI 420) Source: Healey, Joseph F. 2015.
More informationTopic 10 - Linear Regression
Topic 10 - Linear Regression Least squares principle Hypothesis tests/confidence intervals/prediction intervals for regression 1 Linear Regression How much should you pay for a house? Would you consider
More information22 Approximations - the method of least squares (1)
22 Approximations - the method of least squares () Suppose that for some y, the equation Ax = y has no solutions It may happpen that this is an important problem and we can t just forget about it If we
More informationGUIDED NOTES 4.1 LINEAR FUNCTIONS
GUIDED NOTES 4.1 LINEAR FUNCTIONS LEARNING OBJECTIVES In this section, you will: Represent a linear function. Determine whether a linear function is increasing, decreasing, or constant. Interpret slope
More informationGrade 8 Mathematics Performance Level Descriptors
Limited A student performing at the Limited Level demonstrates a minimal command of Ohio s Learning Standards for Grade 8 Mathematics. A student at this level has an emerging ability to formulate and reason
More informationChapter 8. Linear Regression. Copyright 2010 Pearson Education, Inc.
Chapter 8 Linear Regression Copyright 2010 Pearson Education, Inc. Fat Versus Protein: An Example The following is a scatterplot of total fat versus protein for 30 items on the Burger King menu: Copyright
More informationOrdinary Least Squares Regression Explained: Vartanian
Ordinary Least Squares Regression Explained: Vartanian When to Use Ordinary Least Squares Regression Analysis A. Variable types. When you have an interval/ratio scale dependent variable.. When your independent
More informationReview for EOC. Arithmetic Sequences, Geometric Sequences, & Scatterplots
Review for EOC Arithmetic Sequences, Geometric Sequences, & Scatterplots Over Lesson 3 4 What is the constant of variation for the equation of the line that passes through (2, 3) and (8, 12)? A. B. C.
More informationI can Statements Grade 8 Mathematics
I can Statements Grade 8 Mathematics ! I can Statements Grade 8 Mathematics Unit 1 I can: 8.EE.1 know and apply the properties of integer exponents to generate equivalent numerical expressions. 8.EE.3
More informationPS 3: Sections 110 & 111
PS 3: Sections 110 & 111 GSI: L. Jason Anastasopoulos janastas@berkeley.edu University of California, Berkeley April 3, 2013 For today 1. Standard Deviation 2. Correlation 3. Regression Standard Deviation
More informationBivariate Relationships Between Variables
Bivariate Relationships Between Variables BUS 735: Business Decision Making and Research 1 Goals Specific goals: Detect relationships between variables. Be able to prescribe appropriate statistical methods
More informationGrade 8 Common Core Lesson Correlation
8.NS The Number System Know that there are numbers that are not rational, and approximate them by rational numbers. 8.NS.1 8.NS.2 Know that numbers that are not rational are called irrational. Understand
More informationSection 1.4 Circles. Objective #1: Writing the Equation of a Circle in Standard Form.
1 Section 1. Circles Objective #1: Writing the Equation of a Circle in Standard Form. We begin by giving a definition of a circle: Definition: A Circle is the set of all points that are equidistant from
More informationDescribing the Relationship between Two Variables
1 Describing the Relationship between Two Variables Key Definitions Scatter : A graph made to show the relationship between two different variables (each pair of x s and y s) measured from the same equation.
More informationCommon Core State Standards for Mathematics
A Correlation of Pearson to the for Mathematics for Mathematics Introduction This document demonstrates how Pearson s digits program meets the for Mathematics. Correlation references are to the digits
More informationModule 1. Identify parts of an expression using vocabulary such as term, equation, inequality
Common Core Standards Major Topic Key Skills Chapters Key Vocabulary Essential Questions Module 1 Pre- Requisites Skills: Students need to know how to add, subtract, multiply and divide. Students need
More informationRadnor Middle School Course Overview. Math Introduction to Algebra 1. Prerequisite: Pre-Algebra, Course 3 Grade: 8
Radnor Middle School Course Overview Math Introduction to Algebra 1 General Information Credits: N/A Length: Full Year Weighted: N/A Format: Meets Daily Prerequisite: Pre-Algebra, Course 3 Grade: 8 I.
More information5 Systems of Equations
Systems of Equations Concepts: Solutions to Systems of Equations-Graphically and Algebraically Solving Systems - Substitution Method Solving Systems - Elimination Method Using -Dimensional Graphs to Approximate
More informationMATH GRADE 8 PLD Standard Below Proficient Approaching Proficient Proficient Highly Proficient
MATH GRADE 8 PLD Standard Below Proficient Approaching Proficient Proficient Highly Proficient The Level 1 student is below proficient The Level 2 student is approaching The Level 3 student is proficient
More information4.1 Solving Systems of Equations Graphically. Draw pictures to represent the possible number of solutions that a linear-quadratic system can have:
4.1 Solving Systems of Equations Graphically Linear- Quadratic A Linear-Quadratic System of Equations is a linear equation and a quadratic equation involving the same two variables. The solution(s) to
More informationLinear Equations. Find the domain and the range of the following set. {(4,5), (7,8), (-1,3), (3,3), (2,-3)}
Linear Equations Domain and Range Domain refers to the set of possible values of the x-component of a point in the form (x,y). Range refers to the set of possible values of the y-component of a point in
More informationREVIEW 8/2/2017 陈芳华东师大英语系
REVIEW Hypothesis testing starts with a null hypothesis and a null distribution. We compare what we have to the null distribution, if the result is too extreme to belong to the null distribution (p
More informationGRADE 8. Know that there are numbers that are not rational, and approximate them by rational numbers.
GRADE 8 Students will: The Number System Know that there are numbers that are not rational, and approximate them by rational numbers. 1. Know that numbers that are not rational are called irrational. Understand
More informationExample #1: Write an Equation Given Slope and a Point Write an equation in slope-intercept form for the line that has a slope of through (5, - 2).
Algebra II: 2-4 Writing Linear Equations Date: Forms of Equations Consider the following graph. The line passes through and. Notice that is the y-intercept of. You can use these two points to find the
More information8 th Grade Math Curriculum Map Thinking with Math Models Time Line: Marking Period 1. Function, linear function, rate of change
8 th Grade Math Curriculum Map Thinking with Math Models Time Line: Marking Period 1 CCSS Essential Questions/ Learning Goals Skills /Vocabulary Formative/ Summative Assessment Resources 8.F.2 Compare
More informationPre-Algebra 8 Overview
Pre-Algebra 8 Overview Pre-Algebra 8 content is organized into five domains for focused study as outlined below in the column to the left. The Pre-Algebra 8 domains listed in bold print on the shaded bars
More informationMAC Module 2 Modeling Linear Functions. Rev.S08
MAC 1105 Module 2 Modeling Linear Functions Learning Objectives Upon completing this module, you should be able to: 1. Recognize linear equations. 2. Solve linear equations symbolically and graphically.
More informationMiSP Speed of Light and Sound Worksheet #3
MiSP Speed of Light and Sound Worksheet #3 Comparing the Speed of Sound and the Speed of Light in Air and Water You have learned a number of differences between electromagnetic waves, like light, radio
More informationError Analysis and Graph Drawing
Error Analysis and Graph Drawing I. Introduction: I.1 It is impossible to do an experimental measurement with perfect accuracy. There is always an uncertainty associated with any measured quantity in an
More informationApplied Calculus I. Lecture 36
Applied Calculus I Lecture 36 Computing the volume Consider a continuous function over an interval [a, b]. y a b x Computing the volume Consider a continuous function over an interval [a, b]. y y a b x
More informationPsych 10 / Stats 60, Practice Problem Set 10 (Week 10 Material), Solutions
Psych 10 / Stats 60, Practice Problem Set 10 (Week 10 Material), Solutions Part 1: Conceptual ideas about correlation and regression Tintle 10.1.1 The association would be negative (as distance increases,
More informationINSIDE ALGEBRA CORRELATED WITH CALIFORNIA S COMMON CORE STANDARDS HIGH SCHOOL ALGEBRA
We CA Can COMMON Early Learning CORE STANDARDS Curriculum PreK Grades 8 12 INSIDE ALGEBRA CORRELATED WITH CALIFORNIA S COMMON CORE STANDARDS HIGH SCHOOL ALGEBRA May 2011 www.voyagersopris.com/insidealgebra
More informationSCOPE AND SEQUENCE CHART
GSE MATH 8 SCOPE AND SEQUENCE CHART Unit Name Unit Description Georgia Standards of Excellence Unit 1 Exponents and Equations Unit 1: Students explore and understand numbers that are not rational (irrational
More informationHow do I apply concepts of rational and irrational numbers? Concepts Competencies Resources Assessments CC E.1. number system properties.
M08.A-N The Number System M08.A-N.1 Demonstrate an understanding of rational and irrational numbers. M08.A-N.1.1 Apply concepts of rational and irrational numbers. How do I apply concepts of rational and
More informationAnalysis of Bivariate Data
Analysis of Bivariate Data Data Two Quantitative variables GPA and GAES Interest rates and indices Tax and fund allocation Population size and prison population Bivariate data (x,y) Case corr® 2 Independent
More informationJUST THE MATHS UNIT NUMBER 5.3. GEOMETRY 3 (Straight line laws) A.J.Hobson
JUST THE MATHS UNIT NUMBER 5.3 GEOMETRY 3 (Straight line laws) by A.J.Hobson 5.3.1 Introduction 5.3.2 Laws reducible to linear form 5.3.3 The use of logarithmic graph paper 5.3.4 Exercises 5.3.5 Answers
More informationApproximate Linear Relationships
Approximate Linear Relationships In the real world, rarely do things follow trends perfectly. When the trend is expected to behave linearly, or when inspection suggests the trend is behaving linearly,
More informationCHAPTER 2 LINEAR LAW FORM 5 PAPER 1. Diagram 1 Diagram 1 shows part of a straight line graph drawn to represent
PAPER. n ( 8, k ) Diagram Diagram shows part of a straight line graph drawn to represent and n.. Find the values of k [4 marks] 2. log ( 3,9 ) ( 7,) log Diagram 2 Diagram 2 shows part of a straight line
More informationStudy Unit 2 : Linear functions Chapter 2 : Sections and 2.6
1 Study Unit 2 : Linear functions Chapter 2 : Sections 2.1 2.4 and 2.6 1. Function Humans = relationships Function = mathematical form of a relationship Temperature and number of ice cream sold Independent
More informationA company recorded the commuting distance in miles and number of absences in days for a group of its employees over the course of a year.
Paired Data(bivariate data) and Scatterplots: When data consists of pairs of values, it s sometimes useful to plot them as points called a scatterplot. A company recorded the commuting distance in miles
More informationApproximations - the method of least squares (1)
Approximations - the method of least squares () In many applications, we have to consider the following problem: Suppose that for some y, the equation Ax = y has no solutions It could be that this is an
More informationA TRADITION of EXCELLENCE A VISION for TOMORROW
Pre-Algebra Grade 8 The Number System To successfully complete Grade 8 Pre-Algebra, the learner will Cluster: Know that there are numbers that are not rational, and approximate them by rational numbers.
More informationGrade 8 Math Spring 2017 Item Release
Grade 8 Math Spring 2017 Item Release 1 Grade 8 Reporting Category: Expressions and Equations Question 2 16701 Content Cluster: Investigate patterns of association in bivariate data. Content Standard:
More informationTwitter: @Owen134866 www.mathsfreeresourcelibrary.com Prior Knowledge Check 1) Find the point of intersection for each pair of lines: a) y = 4x + 7 and 5y = 2x 1 b) y = 5x 1 and 3x + 7y = 11 c) 2x 5y =
More informationAnnouncements: You can turn in homework until 6pm, slot on wall across from 2202 Bren. Make sure you use the correct slot! (Stats 8, closest to wall)
Announcements: You can turn in homework until 6pm, slot on wall across from 2202 Bren. Make sure you use the correct slot! (Stats 8, closest to wall) We will cover Chs. 5 and 6 first, then 3 and 4. Mon,
More information3 RD 9 WEEKS. EE 1 EE 3 EE 4 EE 7a EE 7b EE 8a EE 8b EE 8c SP 1 SP 2 SP 3 SP 4 F 2 F 3 F 5
1ST 9 WEEKS 2ND 9 WEEKS 3 RD 9 WEEKS 4 TH 9 WEEKS NS 1 NS 2 EE 2 G 1 G 2 G 3 G 4 G 5 EE 1 G 9 G 6 G 7 G 8 G 5 EE 5 EE 6 F 1 F 2 EE 1 EE 3 EE 4 EE 7a EE 7b EE 8a EE 8b EE 8c SP 1 SP 2 SP 3 SP 4 SP 4 SP
More informationCorrelation and Regression
Correlation and Regression 8 9 Copyright Cengage Learning. All rights reserved. Section 9.2 Linear Regression and the Coefficient of Determination Copyright Cengage Learning. All rights reserved. Focus
More informationChapter 3. Introduction to Linear Correlation and Regression Part 3
Tuesday, December 12, 2000 Ch3 Intro Correlation Pt 3 Page: 1 Richard Lowry, 1999-2000 All rights reserved. Chapter 3. Introduction to Linear Correlation and Regression Part 3 Regression The appearance
More informationRelationships between variables. Association Examples: Smoking is associated with heart disease. Weight is associated with height.
Relationships between variables. Association Examples: Smoking is associated with heart disease. Weight is associated with height. Income is associated with education. Functional relationships between
More informationALGEBRA 1 CURRICULUM COMMON CORE BASED
ALGEBRA 1 CURRICULUM COMMON CORE BASED (Supplemented with 8th grade PSSA anchors ) UPPER MERION AREA SCHOOL DISTRICT 435 CROSSFIELD ROAD KING OF PRUSSIA, PA 19406 8/20/2012 PA COMMON CORE ALIGNED MATHEMATICS
More information4 The Cartesian Coordinate System- Pictures of Equations
4 The Cartesian Coordinate System- Pictures of Equations Concepts: The Cartesian Coordinate System Graphs of Equations in Two Variables x-intercepts and y-intercepts Distance in Two Dimensions and the
More informationVariance. Standard deviation VAR = = value. Unbiased SD = SD = 10/23/2011. Functional Connectivity Correlation and Regression.
10/3/011 Functional Connectivity Correlation and Regression Variance VAR = Standard deviation Standard deviation SD = Unbiased SD = 1 10/3/011 Standard error Confidence interval SE = CI = = t value for
More informationTextbook: Chapter 1 Lesson 1
8 th Grade Math Curriculum Map **Calculators may be used all year on Assessments** Segment 1 6 Weeks Number System [8-NS1] Know that numbers that are not rational are called irrational. Understand informally
More informationSKILL BUILDER TEN. Graphs of Linear Equations with Two Variables. If x = 2 then y = = = 7 and (2, 7) is a solution.
SKILL BUILDER TEN Graphs of Linear Equations with Two Variables A first degree equation is called a linear equation, since its graph is a straight line. In a linear equation, each term is a constant or
More informationOAKLYN PUBLIC SCHOOL MATHEMATICS CURRICULUM MAP EIGHTH GRADE
OAKLYN PUBLIC SCHOOL MATHEMATICS CURRICULUM MAP EIGHTH GRADE STANDARD 8.NS THE NUMBER SYSTEM Big Idea: Numeric reasoning involves fluency and facility with numbers. Learning Targets: Students will know
More informationGraphing Rational Functions KEY. (x 4) (x + 2) Factor denominator. y = 0 x = 4, x = -2
6 ( 6) Factor numerator 1) f ( ) 8 ( 4) ( + ) Factor denominator n() is of degree: 1 -intercepts: d() is of degree: 6 y 0 4, - Plot the -intercepts. Draw the asymptotes with dotted lines. Then perform
More informationSect The Slope-Intercept Form
0 Concepts # and # Sect. - The Slope-Intercept Form Slope-Intercept Form of a line Recall the following definition from the beginning of the chapter: Let a, b, and c be real numbers where a and b are not
More informationUNC Charlotte 2010 Algebra with solutions March 8, 2010
with solutions March 8, 2010 1. Let y = mx + b be the image when the line x 3y + 11 = 0 is reflected across the x-axis. The value of m + b is: (A) 6 (B) 5 (C) 4 (D) 3 (E) 2 Solution: C. The slope of the
More information