Correlating the Scores of 50 Students on Two Tests, an Investigator

question 26

Multiple Choice

Correlating the scores of 50 students on two tests, an investigator found that the sum of the z-score cross-products was 20.The Pearson's product moment coefficient in this case is:

• A) impossible to compute with the information given.
• B) .02.
• C) .20.
• D) .40.
• E) None of these are true.

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Definitions:

Juvenile Hormone (JH)

A hormone in insects that regulates development, reproduction, and other physiological functions, often influencing the transition from juvenile to adult stages.

Circadian Rhythms

Biological processes that display an endogenous, entrainable oscillation of about 24 hours, governing the sleep-wake cycle among other bodily functions.

Daily Environmental Cues

External signals like light and temperature that influence an organism's daily behaviors and physiological processes.

Activity Period

Activity period refers to the specific time during which an organism is active and engages in various behaviors such as feeding or mating.