# statistics

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 you conduct a t test for independent means, how many degrees of freedom are in the t distribution

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1. Degrees of Freedom = nA + nB - 2

nA = sample size of group A
nB = sample size of group B

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2. 89u

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