a. Use a two-tailed test with a= .05. Conduct the four steps for hypothesis testing and label each step: Step1, Step 2, Step 3, and Step 4. h Calculate Cohen's d %3D

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A major company would like to assess the impact of using a professional trainer to conduct a
confidence-building workshop with its salespeople. A sample of 16 workers is obtained. Half (n = 8)
attend the workshop and the other half (n = 8) serves as a control group. Two weeks later, each of
the participants is given a questionnaire measuring the level of self-confidence. The data are as
follows:
Workshop No Workshp
6
19
13
9
8
18
4
10
13
12
4
14
11
19
5
11
a. Use a two-tailed test with a = .05. Conduct the four steps for hypothesis testing and label
each step: Step1, Step 2, Step 3, and Step 4.
b. Calculate Cohen's d.
c. Are the data sufficient to conclude that thier is a significant difference bewteen groups?
Write your answer in the form of a sentence.
Transcribed Image Text:A major company would like to assess the impact of using a professional trainer to conduct a confidence-building workshop with its salespeople. A sample of 16 workers is obtained. Half (n = 8) attend the workshop and the other half (n = 8) serves as a control group. Two weeks later, each of the participants is given a questionnaire measuring the level of self-confidence. The data are as follows: Workshop No Workshp 6 19 13 9 8 18 4 10 13 12 4 14 11 19 5 11 a. Use a two-tailed test with a = .05. Conduct the four steps for hypothesis testing and label each step: Step1, Step 2, Step 3, and Step 4. b. Calculate Cohen's d. c. Are the data sufficient to conclude that thier is a significant difference bewteen groups? Write your answer in the form of a sentence.
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