A Biology Professor Claimed That the Proportions of Grades in His

question 32

Essay

A biology professor claimed that the proportions of grades in his classes are the same. A sample of 100 students showed the following frequencies. $$\begin{array} { | l | c | c | c | c | c | } \hline \text { Grade } & \text { A } & \text { B } & \text { C } & \text { D } & \text { F } \\\hline \text { Frequency } & 14 & 23 & 27 & 26 & 10 \\\hline\end{array}$$ Determine the rejection region at the 5% significance level.

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Definitions:

Retained Earnings

The portion of a company's profits that is kept or retained for reinvestment in the business, rather than being paid out as dividends.

Store Supplies

Items consumed in the daily operations of a retail business, not intended for sale to customers.

Adjustments Column

A column in accounting ledgers or spreadsheets used for recording adjustments to initial entries for correct financial representation.

Supplies Used

Items consumed during the normal course of business operations, recognized as an expense as they are used.