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# q06_sol - ISyE2028A,Fall2010 SolutionstoQuiz6(versionA&B...

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ISyE2028A, Fall 2010 Solutions to Quiz 6 (version A & B) Version A: 1. In inference for a difference in the means of two normal distributions, which one of the following is the test statistic (or pivotal quantity)? A. µ െ µ . B. X െ X C. D. X ିX ିሺµ ିµ Answer: D 2. In hypotheses testing with null hypothesis H : µ െ µ ൌ 0 and alternative hypothesis H : µ െ µ 0 , let Z be the test statistic and assume that µ and µ are means of two normal distributions with known variances, which one of the following gives the correct critical region?

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