For Statistical Inference About the Mean of a Single Population

question 95

Short Answer

For statistical inference about the mean of a single population when the population standard deviation is unknown, the number of degrees for freedom for the t-distribution is equal to n - 1 because we lose one degree of freedom by using the: $\begin{array}{|l|l|}\hline A&\text { sample mean as an estimate of the population mean.}\\\hline B&\text {sample standard deviation as an estimate of the population standard deviation. }\\\hline C&\text {sample proportion as an estimate of the population proportion. }\\\hline D&\text { sample size as an estimate of the population size.}\\\hline \end{array}$

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