SOLUTION: Assume a simple random sample of 500 Down Syndrome patients has been taken regarding their improvement after taking a certain drug. Assume the population is normally distributed,

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Question 864073: Assume a simple random sample of 500 Down Syndrome patients has been taken regarding their improvement after taking a certain drug. Assume the population is normally distributed, the sample mean is 15, and the population SD is 10. Construct a 98% confidence interval to estimate the population mean μ.



Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

ME = 2.326%2810%2Fsqrt%28500%29%29

CI: 15-ME < u <  15 + ME



90%	z =1.645

92%	z = 1.751

95%	z = 1.96

98%	z = 2.326

99%	z = 2.576