3.1

13 Mean = 30.52 mpg, median = 31.3 mpg, no mode

14 Mean = 93.1 minutes, median = 87 minutes , no mode

15 Mean = 3670 psi, median = 3830 psi, mode = 4090 psi

16 Mean = 266 minutes, median = 266 minutes, mode = 260 minutes

17

  1. Mean is greater than median (skwewed right)

  2. Median is equal to the mean (symmetric)

  3. Mean is less than median (because skewed left)

18

  1. IV

  2. III

  3. II

  4. I

3.2

5 Sample variance = 36, sample standard deviation = 6

6 Sample Variance = 100, sample standard deviation = 10

7 Population variance = 16, population standard deviation = 4

8 Population Variance = 64, population standard deviation = 8

9 Sample variance = 196, sample standard deviation = 14

10 Population variance = 25, population standard deviation = 5

14 Range = 25, sample standard deviation = 8.426