Chapter 6 Assessment. 3. Which points in the data set below are outliers? Multiple Choice. 1. The boxplot summarizes the test scores of a math class?

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1 Chapter Assessment Multiple Choice 1. The boxplot summarizes the test scores of a math class? Test Scores 3. Which points in the data set below are outliers? 73, 73, 7, 75, 75, 75, 77, 77, 77, 77, 7, 7, 9, 9 a. 73, 73 b. 73, 73, 7 c. 7, 7, 9, 9 d. 9, 9 Based on the box plot, which of these must be true? a. The median score is 7. b. The lower quartile score is 5. c. Half of the scores are between 5 and 75. d. The interquartile range is half of the range.. For the given boxplot, what are the correct summary statistics?. Four teachers gave a test to their classes. A summary of the test results are shown below: Teacher Mrs. Lee Mr. Green Ms. Jimenez Mr. Wang Min Score TEST RESULTS Q1 Med Score Q3 Max Score Which teacher s class has the widest spread in the middle 5% of the test scores? a. Min: 5, Max: 5, IQR:, Med: b. Min:, Max: 5, IQR: 15, Med: c. Min: 5, Max: 5, IQR:, Med: d. Min:, Max: 5, IQR: 15, Med: a. Mrs. Lee b. Mr. Green c. Ms. Jimenez d. Mr. Wang

2 5. A student rolled two -sided number cubes several times. The numbers below are the sums of the numbers she rolled. Which histogram represents the data? 7, 11,,, 7, 9, 1, 3, 7,,, 3, 5,, 7,, 11, 5,, 1 a. b. Frequency Frequency Sum. John and Samantha discovered that the means of their grades for the second quarter of their science class were identical. They also noticed that the standard deviation of John's grades is.3, while the standard deviation of Samantha s grades is.3. Which statement must be true? a. In general, Samantha s grades were lower than John s grades. b. Samantha s grades are more consistent than John s grades. c. Samantha had more failing grades during the marking period than John had. d. The median for Samantha s grades is lower than the median for John s grades. 7. The dot-plot represents the number of pizza orders called in during one hour of business. What is the maximum and minimum entry? Sum c. Frequency Number of Pizza Orders a. min: 1; max: b. min: 1; max: 17 c. min: 15; max: 1 d. min: ; max: Sum d. Frequency Sum

3 . The following are prices for a 5 inch T.V. found in different stores around Roseville: 11. Consider the following two histograms and decide which of the statements are true., 9, 11, 111, 97, 135, 13,, 135, 13, 19, 11, 9, 9 Which of the following describes the data? a. Skewed to the right b. Symmetric c. Skewed to the left d. Uniform 9. For the following data set, calculate the standard deviation (use a calculator). a. 1.9 b. 3. c d..17 Miles per Day Frequency What mathematical term would you use to describe 1 movies watched last month? I. Both graphs have gaps and clusters. II. Only one graph is symmetric. III. Both graphs have the same mean. IV. Both graphs have the same range. a. I, II, III, and IV b. II, III, and IV c. I, III, and IV d. III and IV 1. Which of the following displays a data distribution on a five number summary? a. box-and-whisker plot b. dot-plot c. frequency table d. histogram Number of Movies Watched Last Month a. mode b. median c. range d. outlier

4 13. The median of a distribution is 15 and the interquartile range is 5. Identify the statement(s) that must be true. I. 5% of the data are between 15 and 175. II. 5% of the data are less than 15. III. 75% of the data are greater than 15. a. I only b. II only c. I and II only d. I, II, and III 15. The box-and-whisker plots below show the average monthly temperatures for Boston and Seattle. Seattle Which of the following statements are true? Boston 1. The histogram shows the number of pets that families own. Number of Families Number of Pets I. The temperatures in Seattle have a greater spread than the temperatures in Boston. II. Boston and Seattle have nearly identical median temperatures. III. The interquartile range for the temperatures in Boston is greater than the interquartile range for the temperatures in Seattle. a. I and II only b. II only c. II and III only d. III only Which statement is true about the histogram? a. All families have or more pets b. Most families have 1 pets c. Most families have less than 9 pets d. Most families have more than 9 pets

5 Chapter 7 Assessment Multiple Choice 1. Claire makes monthly payments on her loan at the bank. She pays different amounts each month. However, she can approximate the total amount that she owes the bank by using the linear equation y = -15x + 15, where y is the total amount owed and x is the number of months in repaying the loan. Which statement is true based on the equation? a. She started with a total loan of $15 b. She started with a total loan of $1,. c. She pays approximately $1,5 each month. d. She pays approximately $15 each month.. Merideth planted tulips around her house. Each day, she tracks the number of blossoming buds. For the days that she tracks the tulips, she finds that the linear equation y = x + 3 estimates the number of blossoming buds on any of the days from 1-. What does the slope represent in this context? a. Approximately 3 buds blossom each day. b. Approximately buds blossom each day. c. The day Merideth started tracking blossoming buds, there were already blossoming buds. d. The day Merideth started tracking blossoming buds, there were already 3 blossoming buds. 3. Ms. Rosenberg collects information about her students. She records students favorite movie type in the table below, and separates the responses by age. Age Comedy Favorite movie genre Romantic comedy Action Thriller 15 years old years old How many students are 15-year-olds and prefer action movies? a. b. 1 c. 1 d.. A survey of 9 students was conducted regarding the Mascot for their new junior high school. The results are summarized in the table below. Cougars Hawks Knights Total Male Female Total What percentage of females preferred Knights? a. 35.1% b % c..13% d..7%

6 5. Which scatter plot is most likely to have a correlation coefficient of r = -.5? a.. What should be true in order for a scatter plot to show that a linear fit may be appropriate for a data set? a. The points should appear as an upward curve. b. The points should be scattered randomly. c. The points should appear to lie generally along a line. d. The points for should all lie above the line or below the line. b. 7. The scatter plot shows a relationship between the amount of time a customer waits in line and the number of people in line ahead of that customer when he/she entered the line. c. Minutes Waiting People Ahead of Customer d. Which equation would represent the line of best fit for this data? a. y = 7.5x +. b. y =.5x + 1. c. y =.5x d. y =.x

7 . Using line of best fit in the graph below, what is the best prediction of electrical use when the high temperature is 9? Energy Consumption. The scatter plot below shows the relationship between the age and value of Judy s car. A curve of best fit has been drawn. Value of Judy s Car Electricity ( 1, kwh) Value (in dollars) High Temperature ( F) Age of Car (in years) a. 7, kwh b. 7, kwh c. 5, kwh d. 1,, kwh 9. The table shows the growth of the world population. Use the table of data below to determine which equation best models this data. Year Population (millions) a. y = -95.x 13. b. y = (.5)(1.1) x c. y = (1.1)(.5) x d. y = 13.x 95. Use the curve of best fit to approximate how much Judy s car will have decreased in value when the car is years old. a. $, b. $, c. $1, d. $, 11. A data set has a correlation coefficient of.13. Which statement about the data is true? a. The data has a strong negative linear b. The data has a weak negative linear c. The data has a strong positive linear d. The data has little or no linear

8 1. Which statement describes causation? a. When event x increases, event y decreases. b. Event x and event y have a linear c. When event x increases, event y increases. d. Event x is responsible for a change in event y. 15. What is the purpose of residual plots? a. To determine causation. b. To assess the type of relationship that exists between x and y. c. To check the appropriateness and fit of the regression equation for the data. d. To measure the variability in the residuals. 13. Victor is collecting data about number of M&Ms in a cup vs. weight of the cup. Which of the following is true about the relationship between these quantities? a. There is correlation but not causation. b. There is causation but not c. There is both causation and d. There is neither causation nor 1. Hannah randomly selected 1 men and measured the height and shoe size of each. She found the correlation coefficient to be.93. Based on her data, which of the following is a reasonable conclusion about the relationship between these two quantities? a. There is correlation but not causation. b. There is causation but not c. There is both causation and a. There is neither causation nor 1. Consider the following residual plot: Which of the following statements is/are true? I. The residual plot indicates that a line is a reasonable model for the data. II. The residual plot indicates that there is no relationship between the data. III. The correlation between the variables is probably non-zero. a. I only b. II only c. I and III only d. II and III only

9 17. Which type of information could best be displayed on a two-way frequency table? a. the number of daylight hours each day for a month b. the amount of snowfall each week during the winter season c. the number of movies rented during the summer d. the number of types of meals and types of drinks students purchase in the lunchroom 1. The relative frequency table shows types of pizza sold at Katie s Pizza Parlor during one day. What can you conclude for the table? Cheese Pepperoni Veggie Total Stuffed Thick Thin Total a. More people prefer veggie than pepperoni pizza. b. The least favorite type of crust is thin crust. c. Cheese pizza is the overall favorite type of pizza. d. Stuffed crust pizza is more popular than thick crust pizza. 19. Which of the following associations is likely to have a negative correlation? a. Number of hours devoted to studying for a final exam and a student s grade on the final b. The speed of a vehicle and the time to reach your destination c. A teacher s salary and the number of years of teaching experience that teacher has d. The age of and the number of miles an automobile has. Which of the following residual plots indicates a reasonable fit to a given set of data? a. b. c. Residuals Residuals Residuals d. Residuals

10 1. Which graph most clearly shows a positive correlation between the x and y values? a. b. y x y. The table shows the number of bacteria in a culture at the start of each hour as it is being studied. If an exponential function is used to model the problem situation, what would be the domain of the function? Number of Hours (x) Bacteria (y) c. x y a. all real numbers b. all real numbers greater than or equal to c. all real numbers greater than or equal to and less than or equal to 1 d. all real numbers greater than or equal to and less than or equal to 7 d. x y x

11 # EOL Practice Test Answers Chapter # 1. B. D 3. D. A 5. B. B 7. B. A 9. B. B 11. D 1. A 13. B 1. C 15. C Chapter #7 1. D. B 3. D. A 5. C. C 7. B. A 9. B. C 11. D 1. D 13. C 1. A 15. C 1. C 17. D 1. C 19. B. C 1. C. B