Question
A) A statistician claims that a population of interest has a mean greater than 6.4. The...
A) A statistician claims that a population of interest has a mean greater than 6.4. The statistician uses a sample of 16. Assuming that the population is normal, what is the rejection region for the needed distribution to support the claim. Use = 0:001: B) A company estimates that the variance of the life of its products is 3. You work for a consumer advocacy group and are asked to test this claim. You Önd that a random sample of the lives of 27 of the companyís product has a variance of 2.8. At = 0:05; which of the following is TRUE? Circle your answer. (1) 15.1 is not in the rejection region. (2) The corresponding test statistic (score) is equal to 20.06 (3) Reject the null hypothesis (4) The sum of the critical values is 55.767 (a) 1 only, (b) 1 and 4 only, (c) 2 only (d) 4 only (e) 3 and 4 only.
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