The Final Examination Grades of Random Samples of Students from Three

Essay

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