Before After 4 1 3. 3.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Compute Cohens D

(Use this information for questions 17 - 19). A researcher would like to determine if
relaxation training will affect the number of headaches for chronic headache sufferers. For a
week prior to training, each participant records the number of headaches suffered.
Participants then receive relaxation training and for the week following training the number of
headaches is again measured. The data are as follows:
Before
After
4
1
3
3
3
1
6
1
4
3
4
2
Transcribed Image Text:(Use this information for questions 17 - 19). A researcher would like to determine if relaxation training will affect the number of headaches for chronic headache sufferers. For a week prior to training, each participant records the number of headaches suffered. Participants then receive relaxation training and for the week following training the number of headaches is again measured. The data are as follows: Before After 4 1 3 3 3 1 6 1 4 3 4 2
Compute Cohen's d to measure the size of the effect.
Cohen's d =
Transcribed Image Text:Compute Cohen's d to measure the size of the effect. Cohen's d =
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