3.1

13 Mean: 30.5, Median: 31.3, No mode

14 Mean: 88.9, Median: 85.9, No mode

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

16 Mean: 266, Median: 266, Mode: 260

17

  1. Skewed to the right, mean > M

  2. Symmetric, mean = M

  3. Skewed to the left, mean < M

3.2

5 Mean is 11, Sample variance and standard deviation is 6.

6 Mean is 82, Sample variance and standard deviation is 10.

7 Median is 9, Population variance and standard deviation is 4.

8 Median is 15, Population variance and standard deviation is 8.

9 Mean is 30, Sample variance and standard deviation is 14.

10 Median is 12, Population variance and standard deviation is 5.

14 Range is 25, Sample Standard Deviation is 8.5.

24

  1. 6 seconds

  2. The histogram is bell shaped thus the Empirical Rule is okay to use.

  3. 98%

  4. 98%

  5. 16%

  6. 16%