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 only be used 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 (Least Significant Difference) test is designed for simple pairwise comparisons, not for testing complex or multiple contrasts simultaneously. It assumes independence among the tests, which might not hold in the case of multiple or complex contrasts.

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- $\mu$