Use the given frequency distribution to find the

(a) class width.
(b) class midpoint of the first class.
(c) class boundaries of the first class.

Height (in inches)
Class
23-30
31-38
39-46
47-54
55-55

Frequency, f
3
8
14
15
13

Answers:
(a.) Width: 7, midpoint: 27, boundaries: 22.5-30.5

(b.) Width: 7, midpoint: 27, boundaries: 23-30

(c.) Width: 8, midpoint: 26.5, boundaries: 22.5-30.5

(d.) Width: 8, midpoint: 26.5, boundaries: 23-30