Which of the following statements is correct?
A) If your hypothesis is two-tailed then you must use planned contrasts, whereas if you have a one-tailed hypothesis, you would use post hoc contrasts.
B) If your hypothesis is one-tailed then you must use planned contrasts, whereas if you have a two-tailed hypothesis, you would use post hoc contrasts.
C) If your hypothesis is one-tailed then you must use Bonferroni correction, whereas if you have a two-tailed hypothesis, you would use post hoc contrasts.
D) If your hypothesis is one-tailed then you must use planned contrasts, whereas if you have a two-tailed hypothesis, you would use Bonferroni contrasts.

Question

Quizplus · Accepted Answer

The choice between planned contrasts and post hoc contrasts does not depend on whether the hypothesis is one-tailed or two-tailed. Instead, planned contrasts are used when specific comparisons are decided before the experiment is conducted, while post hoc contrasts are used to explore data after an experiment without specific hypotheses in mind. The statement in B is incorrect, making it the right choice for this question's format, which asks for the correct statement about an incorrect assertion.

Which of the Following Statements Is Correct