statistics

6. A sociologist interested in cultural differences compared women of two ethinic groups on a Role Approval Index (high scores mean high degrees of approval of one's social role). The results are 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?

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  1. u mean the z score

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  2. Z = (Mean1 - Mean2)/Standard Error of Difference between means

    Z = (55-51)/.76

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