Question 316141
A laboratory tested 70 chicken eggs and found that the mean amount of cholesterol was 228 milligrams with s = 12 milligrams. Construct a 95 percent confidence interval for the true mean cholesterol content, μ, of all such eggs. 
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sample mean = 228
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Max Error = E = (invT(0.975 with df = 69)*[12/sqrt(70)] 
=  1.9949*1.4343
= 2.86
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95% CI: 228-2.86 < u < 228+2.86
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Cheers,
Stan H.