Lesson 1 Homework Practice
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1 Lesson 1 Homework Practice Scatter Plots Interpret each scatter plot. 1. Games Won Average Game Attendance 2. Car Value (% cost new) Car Age (r) 3. Pumpkin Weight (pounds) Growth Time (das) 4. RIVER Construct a scatter plot of the river s width and the water s speed. River Width (m) Water Speed (km/h) DONATIONS Construct a scatter plot of the number of cars donated to a local charit over the past five ears since 27. Years Since Number of Cars Course 3 Chapter 9 Scatter Plots and Data Analsis 129
2 Lesson 2 Homework Practice Lines of Best Fit 1. BALLOONS Salina is having a surprise part for her friend Ernie. The table shows how man balloons she has been able to blow up b the end of each 1-minute segment. Time (min) Balloons a. Construct a scatter plot of the data. Then draw and assess a line that seems to best represent the data. b. Use the line of best fit to make a conjecture about the number of balloons she will have blown up at the end of 7 minutes. Number of Balloons Time (min) 2. COMIC BOOKS Sidne is selling his comic book collection on the Internet. The scatter plot shows how man comic books he has left at the end of each da. a. Write an equation in slope-intercept form for the line that is drawn. b. Use the equation to make a conjecture about the number of comic books he will have at the end of the seventh da. 3. ICE RINK Maur has an ice rink in his back ard. The scatter plot shows the thickness of the ice relative to the temperature. a. Write an equation in slope-intercept form for the line that is drawn. b. Use the equation to make a conjecture about the 1 3 inches. Comic Books Left Temperature ( F) Das Ice Thickness (in.) Course 3 Chapter 9 Scatter Plots and Data Analsis 131
3 Lesson 3 Homework Practice Two-Wa Tables For Eercises 1-6, use the Venn diagram at the right and the information below. The Venn diagram compares the roller coasters at an amusement park as to whether or not the are made of steel and whether or not the have loops. Steel Loops Complete the two-wa table below. 2. How man roller coasters are at the amusement park? Steel Not Steel Total Loops No Loops Total 3. Find the relative frequencies from the 4. Interpret the relative frequencies ou table in Eercise 1 b row. found in Eercise 3. Loops 6 1 =.6 No Loops Steel Not Steel Total 5. Find the relative frequencies from the 6. Interpret the relative frequencies ou table in Eercise 1 b column. Round to found in Eercise 5. the nearest hundredth if necessar. Steel Loops 6 8 =.75 No Loops Not Steel Total Course 3 Chapter 9 Scatter Plots and Data Analsis 133
4 Lesson 4 Homework Practice Descriptive Statistics For Eercises 1 and 2, find the mean, median, mode, and range of each data set. Round to the nearest tenth if necessar. 1. The ages, in ears, of the students in an art class: 23, 21, 19, 23, 24, 17, The number of tet messages sent in a week: 39, 41, 3, 14, 45, 4, 48, 39, 4, 35 For Eercises 3 and 4, find the five-number summar of each set of data. Draw a bo plot of the data. 3. The ages, in ears, of the residents of a retirement communit are shown in the table. Ages in Years The weekl amounts, in dollars, in a bank account are 169, 163, 153, 166, 149, 148, 146, 145, 152, 163, and What is a conclusion that can be drawn from the bo plot for Eercise 4? Course 3 Chapter 9 Scatter Plots and Data Analsis 137
5 Lesson 5 Homework Practice Measures of Variation For Eercises 1 and 2, find the mean absolute deviation of each set of data. Round to the nearest tenth if necessar. Describe what the mean absolute deviation represents. 1. Eercise Time (min) 2. Food Items Donated Refer to the table in Eercise 1. The standard deviation is about 2.4 minutes. Describe the data values that are within one standard deviation of the mean. 4. The table shows the selling prices of various laptops at two electronic stores. a. Find the mean absolute deviation for each set of data. Round to the nearest hundredth. b. Write a sentence comparing their variation. Tablet Prices ($) Craz for Computers Keboard Kings , 9 1,2 1,1 Course 3 Chapter 9 Scatter Plots and Data Analsis 139
6 Lesson 6 Homework Practice Analze Data Distributions 1. CARNIVALS The number of people that attended the carnival each ear is shown in the graph at the right. a. Describe the shape of the distribution. Identif an clusters, gaps, peaks, or outliers. b. Describe the center and spread of the distribution. Justif our response based on the shape of the distribution. Attendance (thousands) Carnival Attendance Year 2. APPLES Mr. Kell s homeroom went apple picking. The line plot shows the number of pounds of apples that were collected. a. Describe the shape of the distribution. Identif an clusters, gaps, peaks, or outliers. Number of Pounds of Apples Picked b. Describe the center and spread of the distribution. Justif our response based on the shape of the distribution. 3. TEMPERATURE The line plot shows the high temperatures for various das through the summer. a. Describe the shape of the distribution. Identif an clusters, gaps, peaks, or outliers. b. Describe the center and spread of the distribution. Justif our response based on the shape of the distribution. High Temperatures Course 3 Chapter 9 Scatter Plots and Data Analsis 141
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