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 46 - 50 frequency 5

Explanation:

Step1: Count data in 46 - 50 range

Count the numbers in the given data set that fall within the 46 - 50 range. The numbers are 46, 47, 48 (if any, but in the data: 47, 46, 50 (50 is included as per class - interval rules where for 46 - 50, \(46\leq x\leq50\))).
The data values in 46 - 50 are 47, 46, 50.

Step2: Calculate frequency

Frequency is the number of data points in a class. We have 3 data points (46, 47, 50) in the 46 - 50 class.

Answer:

3