The degrees of freedom for the test statistic for m when s is unknown is:
A)1
B)n
C)n - 1
D)None of these choices.

Question

Quizplus · Accepted Answer

When s (the sample standard deviation) is used to estimate the population standard deviation, the degrees of freedom for the test statistic are n - 1, where n is the sample size. This is because one degree of freedom is lost in estimating the population mean from the sample mean.

The Degrees of Freedom for the Test Statistic for M