the arithmetic average of a distribution, obtained by adding the scores then dividing by the number of scores
A. Range
B. Mode
C. Median
D. Mean
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in an experiment when neither the participants nor the researchers know who belongs to the control group and who belongs to the experimental group. Only after all the data have been recorded (and in some cases, analyzed) do the researchers learn which individuals are which.
A. Single-blind procedure
B. Inferential statistics
C. Double-blind procedure
D. Measure of central tendency
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