The formula for the ______ of the t-test and F-ratio concerns ______ and involves group ______.

A) numerator; differences between groups; means
B) denominator; differences between groups; standard deviations
C) numerator; differences within groups; standard deviations
D) denominator; differences within groups; means

T-test

A statistical test used to compare the means of two groups and determine if they are significantly different from each other.

F-ratio

A statistic used to compare the variances between groups in an ANOVA test to determine if the groups come from populations with different variances.

Differences

Variations or distinct disparities between two or more entities, values, or conditions.