Question

Refer to the frequency distribution from Section 1.2 Exercise #2 in the text. What is the class width?

A) 9
B) 8
C) 10
D) 11

Answer 1

The class width is the difference between the upper class limit and the lower class limit in a frequency distribution. To calculate the class width, use the formula: Class width = (largest data value - smallest data value) / number of classes.

Step-by-step explanation:

The class width is the difference between the upper class limit and the lower class limit in a frequency distribution. To calculate the class width, we can use the formula: Class width = (largest data value - smallest data value) / number of classes. In this case, since the question provides the number of bars on the histogram (six) and the shoe sizes of 50 male students, we can calculate the class width by finding the range of the shoe sizes and dividing it by the number of bars.

The smallest data value is 9 and the largest data value is 14, so the range is 14 - 9 = 5. The number of bars/classes is given as six. Therefore, the class width is 5 / 6 = 0.83. So, the width of each bar or class interval is approximately 0.83.