The value of the F-ratio obtained in an experiment is evaluated against
A) The probability of a Type II error
B) The value of the F-ratio expected to occur by chance alone
C) An estimate of the population mean
D) A control group F-ratio

Question

Quizplus · Accepted Answer

The F-ratio obtained in an experiment is evaluated against the value of the F-ratio expected to occur by chance alone, which is determined by the degrees of freedom and the significance level of the test. This is the basis for conducting an analysis of variance (ANOVA) test. The F-ratio is calculated by dividing the between-group variance by the within-group variance, and the resulting value is compared to a critical value from an F-distribution table. If the calculated F-ratio is greater than the critical value, it is concluded that there is a statistically significant difference between at least two of the groups being compared. Therefore, the best choice is B.

The Value of the F-Ratio Obtained in an Experiment Is