When possible, matching should be substituted for random assignment.
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Q42: Which of the following is true of
Q43: Which of the following is a limitation
Q44: Which of the following is an advantage
Q45: Experiments afford less control over extraneous variables
Q46: In a "perfect" experiment, the only rival
Q48: Tests of statistical significance indicate whether differences
Q49: An experiment's internal validity depends upon how
Q50: "External validity" refers to the generalizability of
Q51: Laboratory experiments usually are high in external
Q52: The most common method of selecting a
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