MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:Sleep Time A person read that the average number of hours an adult sleeps
on Friday night to Saturday morning was 7.2 hours. The researcher feels that
college students do not sleep 7.2 hours on average. The researcher randomly
selected 15 students and found that on average they slept 8.3 hours. The standard
deviation of the sample is 1.2 hours. At a=0.05, is there enough evidence to say that
college students do not sleep 7.2 hours on average? Assume that the population
is approximately normally distributed. Use the critical value method and tables.
Part 1 of 5
ate the hypotheses and identify the daim.
= 7.2|not claim
claim
Th
bothesis test is a two-tailed
test
nd the critical value(s). Round the answer(s) to three decimal places.
nere is more than one critical value, separate them with commas.
Ctical valuet2145, 2.145)|
Part:2/5
Part 3 of 5
(c) Compute the test value. Always round i score values to three decimal places.
t =
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