document.write( "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.
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Algebra.Com's Answer #520770 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi
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document.write( "ME = \"2.326%2810%2Fsqrt%28500%29%29\"
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document.write( "CI: 15-ME < u <  15 + ME\r
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document.write( "90%	z =1.645
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document.write( "92%	z = 1.751
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document.write( "95%	z = 1.96
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document.write( "98%	z = 2.326
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document.write( "99%	z = 2.576
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