A sample of twenty-five randomly selected students were asked the number of movies they watched the previous week. The results are as follows:

Number of Movies | Frequency

0 5

1 9

2 6

3 4

4 1

a) Sample mean:, b) Median:, c) Mode(s):

The following data are the distances between a sample of 20 retail stores and a large distribution center that services them. The distances are in miles.

29; 37; 38; 40; 58; 67; 68; 69; 76; 86; 87; 95; 96; 96; 99; 106; 112; 127; 145; 150

a) sample mean, b) sample variance, c) sample standard deviation