Exhibit 2-4
Michael's Compute-All, a national computer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below:
-Refer to Exhibit 2-4. The class width of the above distribution is
A)0 to 100
B)20
C)80

Question

Exhibit 2-4
Michael's Compute-All, a national computer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below: 
-Refer to Exhibit 2-4. The class width of the above distribution is
A)0 to 100 
B)20 
C)80

Quizplus · Accepted Answer

To find the class width, we subtract the lower limit of the first class from the lower limit of the second class. The lowest value in the data set is 300 and the highest is 700, so the range is 700 - 300 = 400. If we want the classes to have a width of 20, then we need to divide the range by 20: 400/20 = 20. Therefore, the class width is 20.

Exhibit 2-4 Michael's Compute-All, a National Computer Retailer, Has Kept a Record