Interpreting the Results How do a priori tests differ from post hoc tests?
A)A priori tests are more conservative than post hoc tests.
B)A priori tests can be performed instead of an F test, while post hoc tests cannot be performed without a significant F test.
C)A priori tests present a higher risk of Type 1 error than post hoc tests.
D)A priori tests present a higher risk of Type 2 error than post hoc tests.

Question

Quizplus · Accepted Answer

A priori tests are planned comparisons that are decided upon before performing statistical analyses, while post hoc tests are exploratory analyses conducted after finding a significant overall effect. A priori tests can be performed in place of an F test if the hypotheses are specific enough, but post hoc tests should only be conducted after a significant F test result. Therefore, choice B is correct.

Interpreting the Results How Do a Priori Tests Differ from Post