Question

13. If we select 100 samples from a same population, then the 100 sample means are typically different. a. True b. False 14. When we investigate the population mean from a sample, we can calculate the sample mean but we never know where the population mean exactly is. a. True b. False 15. When we investigate the population mean from a sample, we figure out a range in which the population mean is likely located. a. True b. False 16. Suppose 95% of confidence interval for the population mean is (14.7, 20.5). It implies that there is ______ of chance the population mean is within that range, and there is _______ of chance the population mean is not in that range. a. 95%, 5% b. 5%, 95%

Answer 1

(13)

a. True. This is because from sample to sample the elements may be different.

(14)

a. True. From sample mean we can estimate the population mean, but we can never know the exact value of population mean .

(15)

It implies that there is 95% of chance the population mean is within that range, and there is 5% of chance the population mean is not in that range.

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