The 99 percent confidence interval for the population mean is found from:
[tex]\bar{x}-2.576\frac{s}{ \sqrt{n} }\ \textless \ \mu\ \textless \ \bar{x}+2.576\frac{s}{ \sqrt{n} }[/tex]
[tex]850-2.576\frac{54}{ \sqrt{36} }\ \textless \ \mu\ \textless \ 850+2.576\frac{54}{ \sqrt{36} }[/tex]
The answer is:
[tex]826.82\ \textless \ \mu\ \textless \ 873.18[/tex]
