Refer to the Following Distribution of Commissions

Multiple Choice

Refer to the following distribution of commissions:
-One rule that must always be followed in constructing frequency distributions is that .

A) the number of classes must be less than 10
B) each data point can only fall into one class
C) the width of each class is equal to the range
D) the number of intervals must be an odd number
E) the class intervals must overlap
Refer to the following chart showing a distribution of exporting firms: