Question 1

In a medication trial for a new antidepressant medication the same set of subjects were tested on
a happiness scale before taking the medication and then after [pre test and post test].
Their answers to this test are found in the table A and B
Are the differences statistically significant? Do we accept or reject the null?

1] State the null and the alternative hypotheses
2] Using the data set run a paired sample t-test, two tail test, paired sample
3] Use p = 0.05
A B Your excel formula in fx tool bar should look like this

Before After
55 58
40 55
85 80
90 88
72 75
83 86
67 60
95 89