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Answer 13 and 15!

Answer 13 and 15 In Exercises 13-16, (a) find the test statistic, (b) find the standardized test statistic (c) decide whether the standardized test statistic is in the rejection region, and (d) decide whether you should reject or fail to reject the null hypothesis. The samples are random and independent 13, Claim: , .. μα α-0.01. Sample statistics: x. 16, sı 3.4. ni 30 and 14, s-15, -30 37-2 -2.575 to 2.575 01.28 FIGURE FOR EXERCISE 14 FIGURE FOR EXERCISE 13 4. Claim: > a-0.10 Sample statistics: -500, s1-40, - 100 and x2 = 495, 52-15. n,-75 15. Claim: μ.< μ2; α-0.05. Sample statistics: ī,-2435, s.-75. nl-35 and x 2432, s105,90 3-21-112 o1.88 FIGURE FOR EXERCISE 16 FIGURE FOR EXERCISE 15
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i3 Ho: A,-dz assum e variances uneauO 16-14 2 948 342 152 5 2 斗30 30 Puedue= 0.0053 < 0.01 hesis vejection atea ホーマ, 946 etupu ㄧㄧㄧㄨ二.2435 . S 9 6 2435 2432 752.-t352-

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