Description of hypothesis testing-paired t test

Reference no: EM13109873

1. A researcher studies the effect of cognitive psychotherapy on positive self-regard. The number of positive statements made about oneself is recorded for each participant during the first meeting. After 8 weekly therapy sessions, the measures are repeated for each person. For the following data.

Participant before treatment after treatment

A 7 10

B 6 13

C 9 12

D 5 8

a. Calculate the difference scores and Md

b. Compute SS, sample variance, and estimated standard error

c. Is there a significant treatment effect? Use ±=.05, two tails.

Reference no: EM13109873

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