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:

Non-Verbal Communication

The process of conveying information or expressing feelings without the use of spoken words, through gestures, facial expressions, and body language.

Gaze

Looking at someone’s eyes.

Emblem

A symbolic object or a sign that represents a group, organization, or country, often conveying specific meanings recognized by members of the culture or group.

Display Rule

Socially or culturally prescribed norms that dictate how emotions should be expressed or concealed in various contexts.