In Exercises 15-18, use a x-test to test the claim about the population variance o? or standard deviation o at the given

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In Exercises 15 18 Use A X Test To Test The Claim About The Population Variance O Or Standard Deviation O At The Given 1 (73.47 KiB) Viewed 85 times

In Exercises 15-18, use a x-test to test the claim about the population variance o? or standard deviation o at the given level of significance a using the given sample statistics. For each claim, assume the population is normally distributed. 15. Claim: o2 = 0.52; a 0.05. Sample statistics: sa 0.508, n = 18 16. Claim: q? 2 8.5; a = 0.05. Sample statistics: s2 = 7.45, n = 23 17. Claim: o 24.9; a = 0.10. Sample statistics: S = 29.1, n = 51 18. Claim: o < 40; a = 0.01. Sample statistics: s = 40.8, n = 12 USING AND INTERPRETING CONCEPTS Testing Claims In Exercises 19-28, (a) write the claim mathematically and identify H, and H, (b) find the critical value(s) and identify the rejection region(s), (c) find the standardized test statistic x?, (d) decide whether to reject or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original claim. For each claim, assume the population is normally distributed. 19. Carbohydrates A snack food manufacturer estimates that the variance of the number of grams of carbohydrates in servings of its tortilla chips is 1.25. A dietician is asked to test this claim and finds that a random sample of 22 servings has a variance of 1.35. At a = 0.05, is there enough evidence to = reject the manufacturer's claim?