Assume that you have a set of data with 70 values spread fairly evenly between 0 and 100. The optimal number of categories for a histogram of these data would be approximately
A) 4
B) 10
C) 25
D) 50

Question

Quizplus · Accepted Answer

The optimal number of categories for a histogram can be determined using the square root rule, which suggests that the number of categories should be approximately equal to the square root of the number of data points. In this case, the square root of 70 is approximately 8.4, so rounding up to the nearest convenient number of categories gives us 10, which is answer choice B.

Assume That You Have a Set of Data with 70