Question

as of 2011, the following are the ages at which a countrys presidents were inaugurated
45, 54, 51, 54, 51, 54, 60, 44, 56, 69, 58, 65, 67, 65, 55, 58, 42, 57,
51, 66, 57, 59, 61, 63, 51, 66, 64, 44, 63, 48, 69, 45, 61, 53, 55, 50,
64, 61, 51, 58, 57, 47, 58, 69
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
41 - 45
46 - 50
51 - 55
frequency
5
3

Explanation:

Step1: Count the frequency for the class 51 - 55

Go through the data set and count the number of values that fall within the range \(51 - 55\). The values \(51,51,51,51,53,55,55\) fall in this range. So the frequency is \(7\).

Answer:

The frequency for the class \(51 - 55\) is \(7\).