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August 2, 2015

Homework Help: statistics

Posted by Sarah on Wednesday, October 26, 2011 at 11:34am.

1. The on-campus housing costs for a semester at a state university are Normally distributed with
a mean of $1553 and a standard deviation of $329.
(a) What is the distribution of the mean on-campus housing cost for a semester at this university
for a random sample of 50 students?
(b) What is the probability that a randomly selected on-campus student spends more than $1200
per semester?
(c) What is the probability that a random sample of 50 students spends an average of less than
$1500?
(d) What is the probability that a random sample of 50 students spends an average of $1450 to
$1600 per semester?

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