Test 1 Review

Test 1 Review Directions: For all calculations, round to two decimal places unless otherwise directed in class. 1. A high school athletic director is collecting info about the athletes at his school and some of the variables for the data he collects are listed below. For each variable listed, indicate whether it is quantitative or categorical followed by the type of categorical or quantitative. a. Sport b. Number of seasons they’ve played the sport c. T-shirt size 2. Given the data below, create a stem and leaf plot 3. A local elementary school wants to survey parents about the carpool line. Describe which sampling method is being used for each situation described: a. Randomly select 20 classes and interview the parents in those classes. b. Take a list of students and select every 75 th name and interview their parents. c. Stand by the front door and ask people as they leave open house. d. Divide students by grade and then select students from each grade. 4. Dr. Galloway kept up with the receipts from the fast food places she has visited in the last few weeks. The table below lists the business for each receipt she had in the stack. (This is fictional but a little too close to the truth  ). Make a table that contains the frequency and relative frequency. (express relative frequency as a percent rounded to two decimal places) Chickfila Zaxby’s Panera Zaxby’s Chickfila Chickfila Wendy’s Chickfila Zaxby’s Chickfila Panera Wendy’s Panera Chickfila Wendy’s Chickfila Chickfila Zaxby’s 5. The table below gives the grades from the first test for a previous class of Dr. Galloway. Use this information to create a frequency distribution and histogram . Start with a lower class limit of 40 and use a class width of 12. 6. In a survey, young adults ages 18 – 25 were asked to estimate their average monthly bank balance. The table below gives the responses for 15 individuals. Find the following: a) Mean, b) Sample standard deviation, c) IQR, d) Five number summary, e) Lower and upper outlier boundaries, f) draw and label the boxplot 7. Describe the histogram and indicate which of the following is true: a. median < mean b. median > mean c. median approx.= mean 3 0 8 3 0 9 3 0 9 3 1 3 3 1 7 3 1 8 3 1 8 3 1 8 3 1 9 3 2 1 3 2 2 3 2 6 3 4 0 3 4 1 3 5 1 3 5 8 46 68 78 82 88 93 99 47 69 78 83 89 94 99 49 72 78 85 89 95 99 50 73 80 85 90 96 99 62 75 81 85 91 97 100 66 75 81 87 92 98 100 120 0 150 0 142 5 375 185 0 147 5 155 0 210 0 250 0 210 0 140 0 162 5 167 5 180 0 200 0