(01.01 LC)  Which of the following variables can be classified as quantitative? (4 points) Street name Zip code Population Number of children in household

(01.03 MC) The Jones school district gives awards to its schools based on overall student attendance. The data for attendance are shown in the table below, where Min represents the fewest days attended and Max represents the most days attended for a single student: School Min Max Range Mean Median IQR σ High School X 108 180 72 169 150 47.5 29.5 High School Y 112 180 68 160 124 49.5 32.4 High School Z 130 180 50 162 151 39.5 27.5 Part A: If the school district wants to award the school that has the most consistent attendance among its students, which high school should it choose and why? Justify your answer mathematically. (5 points) Part B: If the school district wants to award the school with the highest average attendance, which school should it choose and why? Justify your answer mathematically. (5 points) (10 points)

(01.05 MC) Mr. Moore’s physics class built different-shaped parachutes to see which shapes were more effective. The students tested the parachutes by dropping them from a height of 30 feet and timing the fall. They calculated the summary below: Mean Std Dev Min Q1 Median Q3 Max 5.6 secs 0.6 sec 3.3 secs 4.5 secs 4.8 secs 5.2 secs 7.8 secs The students wanted to see what happens to their times when they drop the parachutes from 45 feet. They find that every drop is increased by 2.5 seconds. Find the new mean and standard deviation. (4 points)

(01.03 MC) The Harris school district gives awards to its schools based on overall student attendance. The data for attendance are shown in the table below, where Min represents the fewest days attended and Max represents the most days attended for a single student: School Min Max Range Mean Median IQR σ High School A 98 180 82 158 148 55.5 35.2 High School B 105 180 75 145 124 48.5 28.2 High School C 102 180 78 169 151 53.5 31.3 Part A: If the school district wants to award the school that has the most consistent attendance among its students, which high school should it choose and why? Justify your answer mathematically. (5 points) Part B: If the school district wants to award the school with the highest average attendance, which school should it choose and why? Justify your answer mathematically. (5 points) (10 points)

(01.06 LC)  When 25 employees were first hired in 2011 for a pharmaceutical company, Company A, the starting annual salary was $38,000. A competing pharmaceutical company, Company B, had the same starting salary for 25 employees hired the same year. In 2016, data was collected on the annual salaries of these same employees at each company. This data is displayed in the boxplots shown: Part A: Compare the annual salary distributions. (4 points)Part B: What are the pros and cons of working at each company? Explain using what you found in Part A. (6 points) (10 points)

(01.02 LC)  Mateo scored in the 55th percentile of his class on the latest math exam. What does this mean in relation to the data set, and what did he score on the exam? (5 points){35, 42, 55, 68, 69, 72, 72, 77, 78, 78, 82, 85, 87, 88, 90, 93, 94, 96, 96, 99}

(01.02, 02.01 MC) A surveyor randomly interviewed 65,439 people who live in Virginia to gather information on whether national healthcare is accomplishing its goals.Part A: What are the population and sample in this survey? (4 points)Part B: The survey found that 71% of females and 88% of males visited a family doctor at least once in the past year. Do you think these approximations of the sample are close to approximations of the entire population? Explain. (6 points) (10 points)

(01.02 MC)  The following table shows the number of hours some high school students in 2 cities spend searching the Internet each week: City A 35 36 35 34 35 38 36 36 38 City B 22 20 50 25 24 65 25 26 24 Part A: Create a five-number summary and calculate the interquartile range for the two sets of data. (6 points) Part B: What is the best measure of center? Justify your answer. (4 points) (10 points)

(02.04 LC)  For a certain experiment, the available experimental units are six people: three females (f) and three males (m). Use (1f, 2f, 3f) to denote the females and (1m, 2m, 3m) to denote the males. There are to be three treatment groups: A, B, and C. If a randomized block design is used, with the experimental units blocked by gender, which assignment of treatments is not correct? (5 points)

(02.05 LC)  A researcher is studying the effects of playing chess on memory improvement. He identifies 50 people who play chess and 50 people who do not. Each of the 100 people is given a questionnaire designed to determine memory level. None of the 100 people who participated in the study knew they were part of a study. Which statement is true? (5 points)