The Following Sample of 16 Measurements Was Selected from a Population

Essay

The following sample of 16 measurements was selected from a population that is approximately normally distributed.

$\begin{array} { l l l l l l l l } 61 & 85 & 92 & 77 & 83 & 81 & 75 & 78 \end{array}$
$\begin{array} { l l l l l l l l } 95 & 87 & 69 & 74 & 76 & 84 & 80 & 83 \end{array}$

Construct a 90% confidence interval for the population mean.