College tuition: The mean annual tuition and fees in the
2013-2014 academic year for a sample of 20 private colleges in
California was $32,000 with a standard deviation of $7200. A
dotplot shows that it is reasonable to assume that the population
is approximately normal. Can you conclude that the mean tuition and
fees for private institutions in California is less than $35,000?
Use the =α0.10 level of significance and the P-value method with
the TI-84 Plus calculator.
A) State the appropriate null and alternate hypotheses.
b) Compute the value of the test statistic. Round the answer to
at least two decimal places. z=
(C) Find the P-value. Round the answer to at least four decimal
places.
(d) Determine whether to reject H0.
(E). There (is, is not) enough evidence to conclude that the
scores have decreased.