Question 21

8, 10, 11, 7, 6, 8, 4, 6, 4, 10, 1, 8, 12, 5, 6, 7, 14, 9, 7, 5.

Use the Empirical Rule to determine an interval which contains approximately 95% of the observations assuming the frequency distribution is bell-shaped.

Question 22

For this data set (8, 10, 11, 7, 6, 8, 4, 6, 4, 10, 1, 8, 12, 5, 6, 7, 14, 9, 7, 5), what is the interquartile range? What does the interquartile range represent?

Question 23

What is the relative frequency for the number of wage earners with wages in the $7 up to $10 class?

Hourly Wages Number of Wage Earners

$4 up to $7 18

$7 up to $10 20

$10 up to $13 36

$13 up to $16 6

Question 24

Draw a Box Plot for the following data:

8, 10, 11, 7, 6, 8, 4, 6, 4, 10, 1, 8, 12, 5, 6, 7, 14, 9, 7, 5