A Random Sample of 36 Magazine Subscribers Is Selected to Estimate

Essay

A random sample of 36 magazine subscribers is selected to estimate the mean age of all subscribers. The data follow. Use Excel to construct a 90% confidence interval estimate of the mean age of all of this magazine's subscribers. $$\begin{array} { l l | l l | l l } \text { Subscriber } & \text { Age } & \text { Subscriber } & \text { Age } & \text { Subscriber } & \text { Age } \\\hline 1 & 39 & 13 & 40 & 25 & 38 \\2 & 27 & 14 & 35 & 26 & 51 \\3 & 38 & 15 & 35 & 27 & 26 \\4 & 33 & 16 & 41 & 28 & 39 \\5 & 40 & 17 & 34 & 29 & 35 \\6 & 35 & 18 & 46 & 30 & 37 \\7 & 51 & 19 & 44 & 31 & 33 \\8 & 36 & 20 & 44 & 32 & 41 \\9 & 47 & 21 & 43 & 33 & 36 \\10 & 28 & 22 & 32 & 34 & 33 \\11 & 33 & 23 & 29 & 35 & 46 \\12 & 35 & 24 & 33 & 36 & 37\end{array}$$