The hypothesis, "Women who jog regularly are more likely than those who do not to have amenorrhea" is which of the following?
A) Null
B) Not testable
C) Directional
D) Nondirectional
C
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Directional hypotheses predict the direction of a relationship; nondirectional hypotheses predict the existence of relationships, not their direction. A hypothesis states predicted relationships between two or more variables—that is, the anticipated association between independent and dependent variables. Testable research hypotheses, such as this one, predict the existence of relationships; null hypotheses, which express the absence of a relationship, are the hypotheses subjected to statistical testing.
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