Question: What is t /2, df for a 90% confidence interval of the population mean based on a sample of 25 observations? Group of answer choices

What is t/2,dffor a 90% confidence interval of the population mean based on a sample of 25 observations?

Group of answer choices

a) 1.6772

b) 1.7109

c) 1.6896

d) 2.0639

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