00:01
All right, so for this problem, we'd have that our null hypothesis is that the mean difference is equal to zero.
00:12
Since we're just testing to see if there is a significant difference in positive coping skills, then we'd have that our alternate hypothesis is that the mean difference does not equal zero.
00:25
You'll be using a paired t test, where if we are testing as, okay, we're not given a level of significance, it seems, so i'll just calculate the test statistic and find the p value.
00:47
So our test statistic is going to be given by our sample mean difference divided by the standard deviation of the differences over the square root of our sample size.
00:59
So we're given that our sample mean difference is equal to 15 points, that our sample variance is 13 .09, so the standard deviation.
01:09
Would be square root of 137 .09.
01:12
We divide that by the square root of n, which is 6...