The following frequency distribution shows the amount earned yesterday by employees of a large Las Vegas casino.Estimate the mean daily earnings.
A)$112.50
B)$125.01
C)$105.47
D)$117.13

Question

The following frequency distribution shows the amount earned yesterday by employees of a large Las Vegas casino.Estimate the mean daily earnings. 
A)$112.50 
B)$125.01 
C)$105.47 
D)$117.13

Quizplus · Accepted Answer

To estimate the mean daily earnings, we need to find the midpoint of each class interval and multiply it by its corresponding frequency. Then we add all these products and divide by the total frequency. Using this method, we get:

Mean = (60*10 + 80*28 + 100*48 + 120*42 + 140*22)/150
Mean = 117.13

Therefore, the best choice is D, which is $117.13.

The Following Frequency Distribution Shows the Amount Earned Yesterday by Employees