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Chapter 8: Q. 9.129 (page 391)

Left-Tailed Hypothesis test and CIs.In Exercise 8.146 on page345, We introduce one-sided one-mean t-intervals. The following relationship hold between hypothesis test and confidence interval for one-mean t procedures: For a left-tailed hypothesis test at significance level 伪: the null hypothesis H0:渭=渭0will be rejected in the favor of alternative hypothesis Ha:渭<渭0if and only if 渭0is greater than or equals to (1-伪)-level confidence interval for 渭. In each case illustrate the preceding relationship by obtaining the one mean t-interval and comparing the result to the conclusion of the hypothesis test in the specified exercise.

a. Exercise 9.117 b. Exercise 9.118.

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Exercise 19

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