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In constructing a confidence interval estimate for a population mean, when we replacewith the sample standard deviation (s), we introduce a new source of variability

In constructing a confidence interval estimate for a population mean, when we replacewith the sample standard deviation (s), we introduce a new source of variability and the sampling distribution we use is:

A.the normal distribution

B.F- distribution

C.t -distribution

D.chi-square distribution

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