Four Different Types of Insecticides Are Used on Strawberry Plants

Essay

Four different types of insecticides are used on strawberry plants. The number of strawberries on eachrandomly selected plant is given below. Test the hypothesis that the type of insecticide makes no difference inthe mean number of strawberries per plant. Use α = 0.01. $$\begin{array} { c c c c } \hline \text { Insecticide } 1 & \text { Insecticide 2 } & \text { Insecticide 3 } & \text { Insecticide 4 } \\\hline 6 & 5 & 6 & 3 \\7 & 8 & 3 & 5 \\6 & 5 & 3 & 3 \\5 & 5 & 4 & 4 \\7 & 5 & 2 & 4 \\6 & 6 & 3 & 5 \\\hline\end{array}$$