The t-distribution for developing a confidence interval for a mean has degrees of freedom equal to:
A) n + 2
B) n +1
C) n
D) n - 1
E) n - 2

Name: The t-distribution for developing a confidence interval for a mean has degrees of freedom equal to: A) n + 2 B) n +1 C) n D) n - 1 E) n - 2
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Question

Quizplus · Accepted Answer

The degrees of freedom for a t-distribution when developing a confidence interval for a mean is equal to n-1. This is because one degree of freedom is lost when estimating the population mean using the sample mean.

The T-Distribution for Developing a Confidence Interval for a Mean