Four Groups of Subjects Were Randomly Selected, and Subjected to Different

Short Answer

Four groups of subjects were randomly selected, and subjected to different experimental treatments. Their scores were: $$\begin{array} { c c c c } \text { Group 1 } & \text { Group 2 } & \text { Group 3 } & \text { Group 4 } \\5 & 7 & 8 & 15 \\4 & 5 & 7 & 14 \\3 & 6 & 6 & 18 \\6 & 8 & 8 & 12\end{array}$$
a. Calculate the F ratio
b. Should Ho be rejected ? If rejected, state the probability of alpha error.