24. Suppose that in an example, pes the sample size n changed from 36 to 50, whi

Question

24. Suppose that in an example, pes the sample size n changed from 36 to 50, while the other guantitis remain the size n same. The area of the rejection region (?) under the Ho distribution would A. become larger. B. become smaller C. remain the same. 25. Which one of the following terms describes the fact that statistics vary from sample to sanp A. Law of Large Numbers B. Central Limit Theorem C. Sampling Variability D. Statistical Inference new type of battery will be installed in heart pacemakers if it can be shown to have a mean lifetime greater than eight year. What are the most appropriate hypotheses? 26. A following set(fs) of hypotheses would the null hypothesis be rejected (at the 0.05 significance level)? A. Ho: ?-65 versus Ha, 65 B. Hai ?-75 versus Ha: ? # 75 C. both A. and B. D. neither A. nor B 27. Suppose the 95% confidence interval for ? is (72, 84). Based on this confidence interval alone, in which of the

Explanation / Answer

24)

option C ; remains the same as it is a fixed quantity

25) option C ; sampling variability

26)

option B is correct

27)

option A is correct as 65 is not in confidence interval

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