2. Here are data from an experiment studying the effect of therapy on anxiety. Anxiety is measured at the end of each of 4 therapy sessions:

Participant	T1	T2	T3	T4
1	9	9	8	7
2	12	12	10	7
3	14	9	7	6
4	10	8	5	4
5	10	9	6	5

Using Excel, compute Fobt.

Using Excel, create a bar graph illustrating the group means.

Is there a significant effect of therapy on anxiety in this sample?