THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
The number of orders that come into a mail-order sales office each month is normally distributed with a mean of 298 and a standard deviation of 15.4.
-What proportion of the total area under the normal curve is above the mean?
A)50%
B)68%
C)95%
D)99.7%

Question

Quizplus · Accepted Answer

By definition, 50% of the area under a normal curve is above the mean and 50% is below the mean.