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Suppose that for a sample size of n=129, we find that the sample mean is 86. Assuming that the standard deviation = 8.1, calculate the

Suppose that for a sample size of n=129, we find that the sample mean is 86. Assuming that the standard deviation = 8.1, calculate the confidence intervals for the population meanwith the following confidence levels.

a. 90%

b. 92%

c. 95%

d. 97%

e. 99%

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