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Level 16
· ◆◆◆◆ · ~13 min
The F Test
The F Test
"Test several coefficients at once — because 'are these variables jointly useless?' is a different question from 'is each one individually significant?'"
joint hypothesesexclusion restrictionsF = [(SSRᵣ − SSRᵤᵣ)/q] / [SSRᵤᵣ/(n−k−1)]joint vs individual significance
A short lesson, then a quiz. ❤️×3 — a wrong answer costs a heart; finish with at least one left and the level is yours. Lose all three and you'll have to try again. Replay any time — XP and cleared levels are never lost.