5. Find the reliability factors based on the t-distribution for the following confidence intervals for the population

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5. Find the reliability factors based on the t-distribution for the following confidence intervals for the population mean (DF = degrees of freedom, n = sample size):

A. A 99 percent confidence interval, DF = 20.

B. A 90 percent confidence interval, DF = 20.

C. A 95 percent confidence interval, n = 25.

D. A 95 percent confidence interval, n = 16.

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