An experimental psychologist has 20 volunteers for a sensory perception experiment and wishes to draw a random sample of 10 of these volunteers. Suppose that he decides to write all combinations of 10...


An experimental psychologist has 20 volunteers for a sensory perception experiment and wishes to draw a random sample of 10 of these volunteers. Suppose that he decides to write all combinations of 10 names on index cards and then draw 1 of the cards at random. How many combinations will there be?



May 04, 2022
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