The Distribution of Room and Board Expenses Per Year at a Four-Year

Multiple Choice

The distribution of room and board expenses per year at a four-year college is normally distributed with a mean of $5850 and standard deviation of $1125. Random samples of size 20 are drawn from this population
And the mean of each sample is determined. Which of the following mean expenses would be considered
Unusual?

A) $5180
B) $6350
C) $6180
D) none of these