What critical value t should be used to calculate the

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What critical value t* should be used to calculate the margin of error for a confidence interval

for the mean of the population in each of the following situations?

a. A 95% confidence interval based on n = 11 observations.

b. A 95% confidence interval from a SRS of 22 observations.

c. A 90% confidence interval from a sample of 22.

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What critical value t should be used to calculate the : what critical value t should be used to calculate the margin of error for a confidence intervalfor the mean of the

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