The following display from a TI-84 Plus calculator presents the results of a hypothesis test for a population mean $\mu _ { . }$ How many degrees of freedom are there?
A) 52
B) 50
C) 33
D) 51

Question

The following display from a TI-84 Plus calculator presents the results of a hypothesis test for a population mean $\mu _ { . }$  How many degrees of freedom are there?
A) 52 
B) 50 
C) 33 
D) 51

Quizplus · Accepted Answer

The degrees of freedom for a hypothesis test for a population mean are calculated as n - 1, where n is the sample size. In this display, the sample size is 51, so the degrees of freedom are 51 - 1 = 50. Therefore, the correct choice is B.

The Following Display from a TI-84 Plus Calculator Presents the Results