SOLUTION: Construct and interpret confidence intervals for the population mean: a random sample of 40 students has a test score with x=8.15 and s=10.2.construct the confidence interval for t

Question 1080755: Construct and interpret confidence intervals for the population mean: a random sample of 40 students has a test score with x=8.15 and s=10.2.construct the confidence interval for the population mean, u if c=0.90
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Construct and interpret confidence intervals for the population mean: a random sample of 40 students has a test score with x=8.15 and s=10.2.construct the confidence interval for the population mean, u if c=0.90
Sample mean = 8.15
ME = z*s/sqrt(n)
ME = 1.645*10.2/sqrt(40) = 2.653
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90% CI:: 8.15-2.653 < u < 8.15+2.653
90% CI:: 5.497 < u < 10.803
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Cheers,
Stan H.
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