2019 AP STATISTICS FREE-RESPONSE QUESTIONS STATISTICS SECTION II Part A Questions 1-5 Spend about 1 hour and 5 minutes on this part of the exam. Percent of Section II score-75 Directions: Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations. 1. The sizes, in square feet, of the 20 rooms in a student residence hall at a certain university are summarized in the following histogram. Number of Rooms 100 150 200 250 300 350 Room Size (square feet) (a) Based on the histogram, write a few sentences describing the distribution of room size in the residence hall. (b) Summary statistics for the sizes are given in the following table. Mean Standard Deviation Min Median Q3 Max 231.4 68.12 134 174 253.5 292 315