Which of the following best explains how the F ratio examines differences among groups?
A) The variability attributable to a treatment is compared to the variability arising from random error
B) The probability of making a type I error is compared to the probability of making a type II error
C) The critical F is compared to the critical t
D) The standard deviation for each group is subtracted from the mean of all groups
E) None of the above

Question

Quizplus · Accepted Answer

The F ratio compares the variability attributable to a treatment to the variability arising from random error. This is calculated by dividing the mean square for the treatment by the mean square for error (or residual). The higher the F ratio, the greater the evidence for differences among groups.

Which of the Following Best Explains How the F Ratio