3.1

13 Mean: 30.5; Median:31.3; Mode: none

14 Mean: 93.1; Median: 87.9; Mode: none

15 Mean: 3670; Median: 3830; Mode: 4090

16 Mean: 266; Median: 266; Mode: 260

17

  1. greater than

  2. approximately equal

  3. less than

3.2

5 Sample SD: 6; Sample Variance: 36

6 Sample SD: 10; Sample Variance: 100

7 Population SD: 4; Population Variance: 16

8 Population SD: 8; Population Variance: 64

9 Sample SD: 14; Sample Variance: 196

10 Population SD: 5; Population Variance: 25

14 Sample SD: 8.4; Sample Variance, 71

24

  1. 6 seconds