For Four Populations, the Population Variances Are Assumed to Be

Essay

For four populations, the population variances are assumed to be equal. Random samples from each population provide the following data. $$\begin{array} { c c c c } \text { Population } & \text { Sample Size } & \text { Sample Mean } & \text { Sample Variance } \\1 & 11 & 40 & 23.4 \\2 & 11 & 35 & 21.6 \\3 & 11 & 39 & 25.2 \\4 & 11 & 37 & 24.6\end{array}$$ Using a .05 level of significance, test to see if the means for all four populations are the same.