The monthly salaries of a sample of 100 employees were rounded to the nearest ten dollars. They ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into seven classes, what is the most convenient class interval?
A) $50
B) $100
C) $150
D) $200

Question

Quizplus · Accepted Answer

To condense the data into seven classes, we need to divide the range of values by seven. The range is $680 ($1,720 – $1,040). Dividing $680 by 7 gives approximately $97.14. The most convenient value for class interval is $100. This gives us the following seven classes:
$1,040 - $1,139
$1,140 - $1,239
$1,240 - $1,339
$1,340 - $1,439
$1,440 - $1,539
$1,540 - $1,639
$1,640 - $1,740

The Monthly Salaries of a Sample of 100 Employees Were