An Investigator Compared the Effectiveness of Two Methods of Instruction

question 84

Multiple Choice

An investigator compared the effectiveness of two methods of instruction (A and B) on the math achievement of boys and girls.The mean test scores are presented below.What interpretation of these results would be justified? Method
$\begin{array}{cc}&&&\text { Method }\\&&\mathrm{A} && \mathrm{B} \\\text { Gender }&\text { Boys }&40 && 30 \\&\text { Girls }&20 & &30\end{array}$

• A)There was a main effect for method of instruction.
• B)There was a main effect for gender.
• C)There was an interaction between gender and method of instruction.
• D)b and c
• E)All of the above are true.

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Definitions:

Net Income

The amount of profit that remains after all operating expenses, interest, taxes, and dividends have been subtracted from total revenues.

End-of-period Spreadsheet

A document or report summarizing the financial status of a company at the end of a fiscal period, including assets, liabilities, and equity.

Statement of Stockholders' Equity

A financial document that represents the changes in the equity interests of a company’s shareholders over a reporting period, including the issuance or purchase of shares, dividends paid, and earnings or losses.

Net Loss

The amount by which expenses exceed revenues, indicating that a business spent more than it earned during a period.