3.1

13 mean:30.51 mpg ; median: 31.3 mpg ; mode: none

14 mean: 86.35 min; median: 87.9 min ; mode: none

15 mean: 3670 psi; median: 3830 psi ; mode: 4090 psi

16 mean: 266 min; median: 266 min ; mode: 260 min

17

  1. the mean would be greater than the median because the graph is right-skewed

  2. the mean would equal the median because the graph is bell shaped

  3. the median would be greater than the mean because the graph is left-skewed

18

  1. mean: 31, median: 32

  2. mean: 31, median: 26

  3. mean: 31, median: 36

  4. mean: 42, median: 42

3.2

5 variance: 36, standard deviation: 6

6 variance: 100 , standard deviation: 10

7 variance: 16, standard deviation: 4

8 variance: 64, standard deviation: 8

9 variance: 196, standard deviation: 14

10 variance: 25, standard deviation: 5

14 range:25, standard deviation: 41.9 min