A social psychologist interested in cultural differences compared women of two ethnic groups on a Role Approval Index on which high scores indicated high degrees of approval of one's own social role. The results were as follows.
Ethnic Group A: N=15, M=55, S2=6.5
Ethnic Group B: N=23, M=51, S2=4.5
If the standard deviation of the distribution of the difference between means is. 76, what is the t score?
a. 5.26 b. - 10.53 c. - 8.00 d. 4.18
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