Question

Jesus wants to test the strength of his workers confidence in him before and after hearing...

Jesus wants to test the strength of his workers confidence in him before and after hearing him deliver a motivational speech. He samples 7 of his followers and records a measure of confidence in him from both before and after the motivational speech. alpha .05, one-tailed.

Before

After

0

4

0

0

3

14

3

23

2

9

0

8

0

6

a) Which type of test should be used?

b) What is the P-value?

c) calculate Cohen's d

Math   Statistics-And-Probability   
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Answer #1

a) we should use matched pair test ;as subjects are same for both groups.

b)

c)

Cohen;s d =|d|/std deviation =8/6.2981=1.27

is is a large effect as Cohen's d is higher than 0.8.

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