3-4. The time (in seconds) that it took for each of 16 vehicles to exit a parking lot in downtown Cincinnati is Compute the mean, median, first quartile, and third quartile for the sample data. 3-6. Examine the following data: c. Develop a box and whisker plot. d. Calculate the 20th and the 30 th percentiles. 3-28. A county library in Minnesota reported the following number of books checked out in 15 randomly selected months: Determine the range, variance, and standard deviation for the sample data. 3-50. You are given the following parameters for two populations: a. Compute the coefficient of variation for each population. b. Based on the answers to part a, which population has data values that are more variable relative to the size of the population mean? 3-52. Given two distributions with the following characteristics: If a value from distribution A is 50,000 and a value from distribution B is 40.0 , convert each value to a standardized z value and indicate which one is relatively closer to its respective mean