Question 855581: Imagine for the national college admission test, women had a mean score of 70 and a variance of 16; men had a mean score of 69 and a variance of 25. If we sample 50 scores from women and 50 scores from men, what’s the standard error of the sample distribution of the difference between means?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Imagine for the national college admission test, women had a mean score of 70 and a variance of 16; men had a mean score of 69 and a variance of 25. If we sample 50 scores from women and 50 scores from men, what’s the standard error of the sample distribution of the difference between means?
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Ans: sqrt[(16/50)+(25/50)] = sqrt(66/50) = sqrt(33/25) = sqrt(33)/5
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Cheers,
Stan H.
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