A researcher used Fisher's LSD to test three contrasts: $\mu$ ₁-$\mu$ ₂,$\mu$ 1 -$\mu$ 3 ,$\mu$ 1 -($\mu$ 2 +$\mu$ 3 )/2. Evaluate this practice. A) This practice is problematic because Fisher's LSD is always too liberal. B) This practice is problematic because Fisher's LSD can be used only to test simple contrasts. C) This practice is problematic because the contrasts are not orthogonal. D) I do not see any problem with this practice. It is great!

Question

Quizplus · Accepted Answer

Fisher's LSD is designed to test pairwise contrasts. It has good control of Type I error when J = 3, but becomes too liberal when J > 3.)

A Researcher Used Fisher's LSD to Test Three Contrasts μ\muμ 1- μ\muμ

A Researcher Used Fisher's LSD to Test Three Contrasts $\mu$ ₁- $\mu$