MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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An examination in psychology has been taken by psychology majors and also by some students from other majors. It is widely believed that the scores for both groups are
25
examinations completed by psychology majors and an independent random sample of
20
examinations completed by students from other majors are selected. Among sampled students, the psychology majors scored a mean of
522.6
points with a variance of
9139.36
, and the students from other majors scored a mean of
507.7
points with a variance of
17004.16
. Can we conclude, at the
0.05
significance level, that the population variance of scores of psychology majors,
σ21
, is less than
σ22
, the population variance of scores of other majors?
Perform a one-tailed test. Then fill in the table below.
Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.)
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