Question

When using a Student's t distribution for a paired differences test with n data pairs, what value do you use for the degrees of freedom?

A. 2n
B. 2n - 1
C. n - 1
D. n

Answer 1

The degrees of freedom for a Student's t distribution in a paired differences test with n data pairs is n - 1.

Step-by-step explanation:

When using a Student's t distribution for a paired differences test with n data pairs, the degrees of freedom is given by n - 1 (C. n - 1). The degrees of freedom (df) represent the number of independent pieces of information in the data. In this case, since the samples are dependent and the data pairs are matched, the degrees of freedom is equal to the number of differences (n) minus 1.