The number of hours worked by each of the employees last week at two stores

A. The data for store 1 shows greater variability.

C. The mean of the data for store 1 is greater than the mean of the data for store 2.

Explanation:

I took the test and got this question right.

A. The data for store 1 shows greater variability.

This is the data for store 1: 16, 28, 36, 40, 78

This is the data for store 2: 22, 27, 33, 36, 40

The range on store 1 is 62, but the range for store 2 is only 18. So store 1 has more variability because the numbers are more spread out.

C. The mean of the data for store 1 is greater than the mean of the data for store 2.

The mean of Store 1's data set [16, 28, 36, 40, 78] is 39.6

The mean of Store 2's data set [22, 27, 33, 36, 40] is 31.6

As you can see, 39.6 is greater than 31.6.