Recently, a store manager tracked the time customers spent in the store from the time they took a number until they left. A sample of 16 customers was selected and the following data (measured in minutes) were recorded:

15 14 16 14 14 14 13 8 12 9 7 17 10 15 16 16

a. Compute the mean, median, mode, range, interquartile range, and standard deviation.

b. Develop a box and whisker plot for these data.