It shows the number of employees who work for the nationwide chain of ACME Hardware. Using the rule, how many classes are required?

It shows the number of employees who work for the nationwide chain of ACME Hardware.

Using the  rule, how many classes are required?

A.   3

B.   4

C.   5

D.   6

Using class width of 5, set lower and upper bounds for first class to be 5 and 9, respectively. Then create other classes, accordingly. What is the relative frequency of the second class?

A.   .2

B.   .225

C.   .250

D.   .025

Which histogram accurately depicts relative frequency of the data provided?