The Final Examination Grades of Random Samples of Students from Three

question 133

Essay

The final examination grades of random samples of students from three different classes are shown below.
$\begin{array}{lll}\text { Class A }&\text { Class B }&\text { Class C }\\92 & 91 & 85 \\85 & 85 & 93 \\96 & 90 & 82 \\95 & 86 & 84\end{array}$ At the α = .05 level of significance, is there any difference in the mean grades of the three classes?

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Definitions:

Percentage

A ratio expressed as a fraction of 100.

Divisional Operating Income

Divisional operating income refers to the profit generated from the operations of a specific division within a company, excluding expenses and incomes that are not directly related to the division's operations.

Proportional Allocation

A method of distributing costs, resources, or revenues among various accounts or projects based on a predetermined criterion, such as usage or benefit.

Residual Income

The amount of income that an individual or business has after all expenses and debts have been paid.