Intro to Stat_Part_56 - 182 CHAPTER 11 THE CHI-SQUARE...

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182 CHAPTER 11. THE CHI-SQUARE DISTRIBUTION Solutions to Exercises in Chapter 11 Solution to Exercise 11.3 (p. 170) a. The data fits the distribution b. The data does not fit the distribution c. 3 e. 19.27 f. 0.0002 h. Decision: Reject Null; Conclusion: Data does not fit the distribution. Solution to Exercise 11.5 (p. 171) c. 5 e. 13.4 f. 0.0199 g. Decision: Reject null when a = 0.05; Conclusion: Local data do not fit the AP Examinee Distribution. Decision: Do not reject null when a = 0.01; Conclusion: Local data do fit the AP Examinee Distribu- tion. Solution to Exercise 11.7 (p. 172) c. 10 e. 11.48 f. 0.3214 h. Decision: Do not reject null when a = 0.05 and a = 0.01; Conclusion: Distribution of majors by graduat- ing females fits the distribution of expected majors. Solution to Exercise 11.9 (p. 173) c. 4 e. 10.53 f. 0.0324 h. Decision: Reject null; Conclusion: Best ski area and level of skier are not independent. Solution to Exercise 11.11 (p. 173) c. 8 e. 33.55 f. 0 h. Decision: Reject null; Conclusion: Major and starting salary are not independent events.
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