Which of the following sentences is correct?
A) If we were to have a two-tailed hypothesis, we would simply predict that the two groups are significantly different from each other, but if you have justification for a one-tailed hypothesis, you would need to state which group you predict would have the significantly higher score.
B) If we were to have a one-tailed hypothesis, we would simply predict that the two groups are significantly different from each other, but if you have justification for a two-tailed hypothesis, you would need to state which group you predict would have the significantly higher score.
C) If we were to have a two-tailed hypothesis, we would simply predict that the two groups are significantly different from each other, but if you have justification for a one-tailed hypothesis, you would need to state the predicted DV score for each condition.
D) If we were to have a two-tailed hypothesis, we would simply predict that the four groups are significantly different from each other, but if you have justification for a one-tailed hypothesis, you would need to use exactly the same method of analysis as used in the previous research.

Question

Quizplus · Accepted Answer

A two-tailed hypothesis does not specify the direction of the difference, only that there is a significant difference. A one-tailed hypothesis specifies which group is expected to have a higher score, requiring a directional prediction.

Which of the Following Sentences Is Correct