The degrees of freedom used to find the t/2 for a confidence interval for the population mean?
A)The degrees of freedom are n − 2.
B)The degrees of freedom are n − 3.
C)The degrees of freedom are n − 1.
D)The degrees of freedom are n.

Question

Quizplus · Accepted Answer

The degrees of freedom used to find the t/2 for a confidence interval for the population mean are n-1, where n is the sample size. This is derived from the t-distribution, which has a different distribution for each sample size. As such, the number of degrees of freedom used depends on the size of the sample.

The Degrees of Freedom Used to Find the T/2 for a Confidence