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Unformatted text preview: H 1 : 1 2 2 2 stdev1 carre > stdev 2 carre The variance in final exam scores of nonaccounting students is greater than the variance in final exam scores of accounting students. Critical value Fu=FINV(0.05, 12,9)=3.07 Decision rule: If F > 3.07, reject H . Test statistic: 2 1 2 2 210.2 36.5 S F S = = = 5.759 F= S1 Carre / S2 carre=5.759 Decision: Since F = 5.759 is greater than the critical bound of F U = 3.07, reject H . There is enough evidence to conclude that the variance in final exam scores of nonaccounting majors is greater than the variance in final exam scores of accounting majors. (2) What assumption do you need to make in testing the professors claim? ANSWER: The test assumes that the two populations are both normally distributed....
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This note was uploaded on 12/10/2010 for the course STAT QAS 129 taught by Professor Zheng during the Fall '10 term at Long Island U..
- Fall '10