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