00:01
Okay, let's look at question 37 together.
00:05
So this question is very similar to the previous one.
00:10
Again, we start with the sample size here, and it's equal to 10 as well.
00:19
The null hypothesis is still mu of d equal to zero.
00:25
And the alternative hypothesis is mu of d greater than zero.
00:29
Here, d is the post score minus pray score.
00:37
I will write down all the d values for each subject.
00:44
So the first one is 0, then negative 2, negative 3.
01:00
Alright, and then we also need to calculate the d square as well.
01:17
Okay, now we're going to to find out the summation of d by adding up all the values in this first row.
01:31
And the value we got is negative 8, so that our d bar is negative 8 divided by 10.
01:44
All right.
01:45
And then the summation of d square is equal to 188.
01:53
So we can calculate the standard deviation now...