Regression & ANOVA Tutor Help
Interpret correlation, fit and use least-squares regression lines, and read one-way ANOVA output.
1 Concept recap
The essentials of Correlation, Regression & ANOVA Basics, on one screen.
1 Concept recap
Correlation
r in [−1, 1]: sign = direction, |r| = strength. r² = % of y-variation explained. Never causation.
Regression
b = r(sy/sx); a = ŷ−bx̄. Line passes through (x̄, ŷ). Do not extrapolate far.
ANOVA
F = MSB/MSW. Large F → group means differ more than noise explains.
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