room and board cost: the mean room and board expense per
year at four-year colleges is $10,614. Assume that the room and
board expenses are normally distributed with a standard deviation
of $1650.
a) find the probability that the room and board cost for a
randomly chosen four-year college is more than
$11,300.
b) for a random sample of 36 four-year colleges, find the
probability that the mean room and board cost is less than
$10,200.