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:
-D=
A) 5
B) 8
C) 10
D) 24

Question

Quizplus · Accepted Answer

To calculate a non-independent t-test, we need to find the difference between the pre and post values for each student.

So, we subtract pre from post for each student and obtain the following differences:

7-2 = 5
15-7 = 8
18-8 = 10
30-20 = 10
22-14 = 8
25-18 = 7

Then we can find the mean of these differences (D):

D = (5 + 8 + 10 + 10 + 8 + 7) / 6 = 8

Finally, we can use this D value and the standard deviation of the differences to calculate the t-value and determine if there is a significant difference between pre and post values for the group.

Given the Following Pre and Post Data Set for Students