A random sample of ten independent observations from a normal distribu tion produced the following values: 51,

Question:

A random sample of ten independent observations from a normal distribu¬

tion produced the following values:

51, 50, 49, 43, 56, 46, 45, 30, 55, 52.

If a = .20, test the hypothesis that the mean is 50 against the alternative that it is not 50. Also, determine a 80 percent confidence interval for the mean. What is the p-value?

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