Question

as of 2011, the following are the ages at which a countrys presidents were inaugurated.
63, 57, 42, 63, 52, 69, 53, 52, 66, 52, 56, 52, 62, 64, 50, 53, 57, 60,
61, 59, 62, 50, 66, 48, 61, 47, 68, 49, 46, 58, 69, 54, 52, 42, 52, 45,
50, 56, 62, 47, 57, 58, 66, 54
construct a grouped frequency distribution for the data. use 41 - 45 for the first class and use the same width for each subsequent class.
type the frequency value for each class.

age	frequency
46-50	8
51-55

Explanation:

Step1: Calculate class width

Class width = 45 - 41 + 1 = 5 (or 46-41=5, consistent)

Step2: Identify data in 51-55

Ages: 52,53,52,52,53,54,52,52,54 → count=9

Answer:

9