3.1

13 Mean = 30.52 mpg, Median = 31.3 mpg, Mode = there is no mode.

14 Mean = 93.1 minutes, Median = 87.9 minutes, Mode = there is 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 > Median, because the mean is approximately 5.1 and the median is approximately 2.5

  2. Mean = Median, because the answers are approximately the same.

  3. Mean < Median, because the mean is approximately 8.42 and the median is approximately 9.5

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 = 8.89

24

  1. 6 seconds

  2. The histogram is bell-shaped, which allows us to use the Empirical Rule to make general statements about the length of eruptions.

  3. 68% (I found these next couple questions very difficult and confusing)

  4. 93%

  5. 4.5%

  6. 11%