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) 50
C) 10
D) 25

Question

Quizplus · Accepted Answer

To choose the optimal number of categories for a histogram, one common rule of thumb is to use the square root of the number of data points. In this case, the square root of 70 is approximately 8.4. Rounded to the nearest whole number, this gives us 8 categories. However, since the data is spread fairly evenly between 0 and 100, it may be more informative to use slightly more categories to capture the distribution more accurately. Therefore, choice C, 10 categories, is the best option.

Assume That You Have a Set of Data with 70