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 25

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 standard error of $\bar { x } _ { 1 }$ - $\bar { x } _ { 2 }$ is

• A) 12.9.
• B) 9.3.
• C) 4.
• D) 2.

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Definitions:

Common Shares

Equities owned in a corporation, representing a share of the company's profits and a right to vote on certain matters.

Acid-Test Ratio

A financial metric used to determine a company's short-term liquidity position by comparing its most liquid assets (excluding inventory) to its current liabilities.

Current Ratio

A liquidity measure that assesses a company's ability to pay its short-term obligations with its short-term assets.

Account Payable

An obligation or liability of a company to pay a short-term debt to its creditors or suppliers.