Given the following pre and post data set for students completing number of push-ups in 30 seconds, if we were to determine if there are differences between pre and post we would calculate a non independent t test. The formula follows:
-If degrees of freedom equal N-1 where N is the number of pairs, the degrees of freedom are
A) 1
B) 4
C) 9
D) 14

Question

Quizplus · Accepted Answer

From the data set, we can see that there are 10 pairs of data (pre and post scores for each student). Therefore, the degrees of freedom for the non-independent t-test will be N-1 = 10-1 = 9. Hence, the correct answer is C) 9.

Given the Following Pre and Post Data Set for Students