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Vera_Pavlovna [14]
3 years ago
6

An independent-measures research study with n = 5 participants in each treatment produces sample variances of 8 and 10, and a 2-

point difference between the two treatment means. given this information, what is the value of cohen's d? 2/2 2/3 2/9 2/18
Mathematics
1 answer:
Crazy boy [7]3 years ago
7 0
Cohen's d is given by:

Cohen's\ d= \frac{mean\ difference}{ \sqrt{ \frac{(n_1-1)s_1^2+(n_2-1)s_2^2}{n_1+n_2-2} } }  \\  \\ = \frac{2}{\sqrt{\frac{(5-1)8+(5-1)10}{5+5-2}}} = \frac{2}{ \sqrt{ \frac{32+40}{8} } } = \frac{2}{ \sqrt{9} }  \\  \\  =\frac{2}{3}
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