While increasing statistical power is an advantage of directional alternative hypotheses, which one of the following is a disadvantage?
A) Directional hypotheses are hard to use
B) When using directional alternative hypotheses you cannot reject the null if the outcome is large but in the opposite direction of the prediction
C) Directional hypothesis leads to an increase in degrees of freedom
D) There are no disadvantage to using directional hypotheses.

Question

Quizplus · Accepted Answer

Directional alternative hypotheses specify a direction of the effect (e.g., greater than, less than), which means if the actual outcome is significant but in the opposite direction of the prediction, the null hypothesis cannot be rejected based on the specified directional hypothesis. This is a disadvantage because it might miss identifying a significant effect that is opposite to the expected direction.

While Increasing Statistical Power Is an Advantage of Directional Alternative