"In the general population, older individuals have lower memory scores than younger individuals." is a ______ hypothesis.
A) null
B) two-tailed
C) one-tailed
D) untestable

Question

Quizplus · Accepted Answer

This is a one-tailed hypothesis because it predicts the direction of the difference between older and younger individuals' memory scores (specifically, that older individuals will have lower scores). Null hypotheses do not make predictions about the direction of differences, and two-tailed hypotheses predict that there will be a difference but do not specify in which direction. The hypothesis is testable, as memory scores can be measured and compared between age groups.

"In the General Population, Older Individuals Have Lower Memory Scores