Chapter 12.2, Problem 9E

In Exercises 9 and 10, use the frequency distribution to determine

1. a. the total number of observations.
2. b. the width of each class.
3. c. the midpoint of the second class.
4. d. the modal class (or classes).
5. e. the class limits of the next class if an additional class were to be added.

9.

Class	Frequency
9-15	4
16-22	7
23-29	1
30-36	0
37-43	3
44-50	5