Four Different Types of Insecticides Are Used on Strawberry Plants

Multiple Choice

Four different types of insecticides are used on strawberry plants. The number of strawberries on eachrandomly selected plant is given below. Use α = 0.01. Which of the following is a correct statement about themeans? $$\begin{array} { c c c c } \hline \text { Insecticide } 1 & \text { Insecticide } 2 & \text { Insecticide } 3 & \text { Insecticide } 4 \\\hline 6 & 5 & 6 & 3 \\6 & 8 & 3 & 5 \\5 & 5 & 3 & 3 \\7 & 5 & 2 & 4 \\7 & 5 & 4 & 4 \\6 & 6 & 3 & 5\end{array}$$

A) The mean of Insecticide 1 is equal to the mean of Insecticide 2.
B) The mean of Insecticide 2 is equal to the mean of Insecticide 3.
C) The mean of Insecticide 3 is equal to the mean of Insecticide 1.
D) The mean of Insecticide 1 is equal to the mean of Insecticide 4.