The null hypothesis: H0: The alternative hypothesis: H1: The type of test statistic: (Choose one)ZtChi squareF The value of the test statistic: (Round to at least three decimal places.) The critical value at the 0.05 level of significance: (Round to at least three decimal places.) Can we conclude that the variance of all scores of psychology majors is less than the variance of all scores of other majors? Yes No
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
examinations completed by psychology majors and an independent random sample of
examinations completed by students from other majors are selected. Among sampled students, the psychology majors scored a mean of
points with a variance of
, and the students from other majors scored a mean of
points with a variance of
. Can we conclude, at the
significance level, that the population variance of scores of psychology majors,
, is less than
, 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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