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...

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