A researcher who flips a coin to determine in which treatment group participants will be assigned is using

A) a confounding variable.
B) matching.
C) a natural, or quasi-, experiment.
D) random assignment.

D

Psychology

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Which of the following is NOT a primary sex characteristic?

a. penis b. ovaries c. prostate gland d. pubic hair

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Primary groups typically function through face-to-face interaction

Indicate whether the statement is true or false.

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