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
E)None of the above

Question

Quizplus · Accepted Answer

To determine the most convenient class interval for the data, we need to find the range of the data and divide it by the desired number of classes. 
Range = 1720 - 1040 = 680 
Desired number of classes = 7 
Class interval = Range / Number of classes 
Class interval = 680 / 7 = 97.14 
Since we want to round to the nearest multiple of 10 for easier calculation, we should round up to the nearest hundred. 
Class interval = 100 
Therefore, the most convenient class interval is $100.

The Monthly Salaries of a Sample of 100 Employees Were