If 60 cases range in score from 4 to 84 and you want 10 intervals in a frequency distribution, approximately what will be the width of each interval?
A) 4
B) 8
C) 12
D) 60

Question

Quizplus · Accepted Answer

To determine the width of each interval, we need to find the range of the data and divide it by the number of intervals. 
Range = Max score - Min score 
Range = 84 - 4 = 80 
Number of intervals = 10 
Width of each interval = Range / Number of intervals 
Width of each interval = 80 / 10 = 8.

Therefore, the best choice would be B) 8.

If 60 Cases Range in Score from 4 to 84