A Statistics Teacher Wants to See If There Is Any $\begin{array}{ll}&\text { Today } & \text { Five Years Ago } \\\bar {x}&82 & 88 \\\sigma^2&112.5 & 54 \\n&45 & 36\end{array}$

question 58

Multiple Choice

A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago.A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken.You are given the following information. $\begin{array}{ll}&\text { Today } & \text { Five Years Ago } \\\bar {x}&82 & 88 \\\sigma^2&112.5 & 54 \\n&45 & 36\end{array}$
The test statistic for the difference between the two population means is

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Definitions:

Stomach Acids

The digestive fluids secreted by the stomach’s lining, consisting mainly of hydrochloric acid, pepsin, and intrinsic factor, crucial for breaking down food and killing pathogens.

Esophagus

The muscular tube that connects the throat (pharynx) with the stomach; it's responsible for transporting food and liquids.

Digestive System

is a series of organs that convert food into essential nutrients that are absorbed into the body and eliminate unused waste material.

Rectum

The final section of the large intestine, terminating at the anus, where stool is stored before being expelled from the body.