Solved: In Exercises 1720, (a) identify the claim and state H0 and Ha, (b) find the

Chapter 10, Problem 19

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In Exercises 1720, (a) identify the claim and state H0 and Ha, (b) find the critical value and identify the rejection region, (c) find the test statistic F, (d) decide whether to reject or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original claim. Assume the samples are random and independent, and the populations are normally distributed. If convenient, use technology.An instructor claims that the variance ofSAT critical reading scores for femalesis different than the variance of SATcritical reading scores for males. Thetable shows the SAT critical readingscores for 9 randomly selected femalestudents and 13 randomly selected malestudents. At a = 0.01, can you supportthe instructors claim?574 C HAPTER 1 0 CHI-SQUARE TESTS AND THE F-DISTRIBUTIONFemale Male480 600 560 310610 800 680 730340 360 740630 530 520520 380 560690 460 400540 630

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