Question

as of 2011, the following are the ages at which a countrys presidents were inaugurated. 45, 54, 51, 54, 51, 54, 68, 44, 56, 69, 58, 65, 67, 65, 55, 58, 42, 57, 51, 66, 57, 59, 61, 63, 51, 66, 64, 44, 63, 46, 69, 45, 61, 53, 55, 50, 64, 61, 51, 58, 57, 47, 58, 68 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 frequency

Explanation:

Step1: Count the number of data points in the 41 - 45 class

Go through the list of ages: 45, 54, 51, 54, 51, 54, 68, 44, 56, 69, 58, 65, 67, 65, 55, 58, 42, 57, 64, 61, 51, 58, 57, 47, 58, 68, 51, 66, 57, 59, 61, 63, 51, 66, 64, 44, 63, 46, 69, 45, 61, 53, 55, 50.
Count how many of these ages fall into the 41 - 45 class. The ages 45, 44, 44, 46, 45 are in the 41 - 45 class.

Answer:

5