The Following Statistics Were Calculated Based on Samples Drawn from Four

Essay

The following statistics were calculated based on samples drawn from four normal populations. $$\begin{array} { | c | c | c | c | c | } \hline \text { Treatment } & & & & \\\hline \text { Statistic } & 1 & 2 & 3 & 4 \\\hline n _ { j } & 4 & 7 & 5 & 5 \\\hline \sum x _ { j } & 52 & 69 & 71 & 61 \\\hline \sum x _ { j } ^ { 2 } & 753 & 798 & 1248 & 912 \\\hline\end{array}$$ Test at the 5% level of significance to determine whether differences exist among the population means.