SOLUTION: a sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statis
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Question 613304: a sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistice students at this college. Give the 95% confidence interval.
I have: E=2.4/64=8/64.64=0.125
95% confidence interval ranges from 28-0.25=27.75 to 28+0.25=28.25
27.75 scores Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! a sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistice students at this college. Give the 95% confidence interval.
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x-bar = 28
ME = 1.96*4/sqrt(64) = 0.98
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95% CI: 28-0.98 < u < 28+0.98
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Cheers,
Stan H.
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