Question

multiple choice 1 point
108 139 120 123 120 122 123 131 131
157 150 124 111 101 135 119 116 117
127 126 139 119 118 114 127
the data set represents the number of minutes a sample of 25 people exercise each week.
compute the class width for a frequency distribution with 5 classes. remember to use the class width rounding rule.

Explanation:

Step1: Find the maximum and minimum values

First, arrange the data in ascending - order (not shown here for brevity). The minimum value is 101 and the maximum value is 157.

Step2: Calculate the range

Range = Maximum value - Minimum value. So, Range = 157 - 101=56.

Step3: Compute the class width

Class width = $\frac{\text{Range}}{\text{Number of classes}}$. Here, the number of classes is 5. So, Class width = $\frac{56}{5}=11.2$. According to the class - width rounding rule, we round up to the next whole number. So, the class width is 12.

Answer:

12