A Random Sample of 36 Magazine Subscribers Is Selected to Estimate

question 78

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. $$\begin{array} { l l | l l | l l } \text { Subscriber } & \text { Age } & \text { Subscriber } & \text { Age } & \text { Subscriber } & \text { Age } \\\hline 1 & 39 & 13 & 40 & 25 & 38 \\2 & 27 & 14 & 35 & 26 & 51 \\3 & 38 & 15 & 35 & 27 & 26 \\4 & 33 & 16 & 41 & 28 & 39 \\5 & 40 & 17 & 34 & 29 & 35 \\6 & 35 & 18 & 46 & 30 & 37 \\7 & 51 & 19 & 44 & 31 & 33 \\8 & 36 & 20 & 44 & 32 & 41 \\9 & 47 & 21 & 43 & 33 & 36 \\10 & 28 & 22 & 32 & 34 & 33 \\11 & 33 & 23 & 29 & 35 & 46 \\12 & 35 & 24 & 33 & 36 & 37\end{array}$$

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Definitions:

Coronary Blood Vessels

Arteries and veins that provide blood supply to the heart muscle.

Venous Blood

Blood that is returning to the heart through veins after having circulated through the body, characterized by its dark red color due to lower oxygen content.

Sympathetic Stimulation

Activation of the sympathetic nervous system, resulting in physiological responses such as increased heart rate and blood flow to muscles.

Metabolic Rate

The rate at which the body uses energy to maintain basic vital functions such as breathing, circulation, and cell production.