Question

as of 2011, the following are the ages at which a countrys presidents were inaugurated.
44, 69, 65, 60, 46, 54, 61, 45, 46, 58, 54, 59, 58, 48, 49, 58, 62, 49,
60, 45, 58, 59, 59, 44, 43, 43, 44, 66, 61, 50, 65, 68, 52, 51, 54, 60,
45, 57, 69, 42, 58, 47, 59, 59
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
41 - 45 9
46 - 50 7
51 - 55 5
56 - 60

Explanation:

Step1: Count the number of data points in the class 56 - 60

Go through the data set: 44, 69, 65, 60, 46, 54, 61, 45, 46, 58, 54, 59, 58, 48, 49, 58, 62, 49, 60, 45, 58, 59, 59, 44, 43, 43, 44, 66, 61, 50, 65, 68, 52, 51, 54, 60, 45, 57, 69, 42, 58, 47, 59, 59.
Count the values that satisfy \(56\leq x\leq60\). The values are: 58, 59, 58, 58, 59, 58, 59, 59, 58, 59, 59.

Answer:

11