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An experimenter wishes to test the hypothesis that a special vitamin supplement increases memory. To do...

An experimenter wishes to test the hypothesis that a special vitamin supplement increases memory. To do this the experimenter randomly assigns subjects to either receive or not receive the vitamin supplement. After allowing a time period for the vitamin to work, the subjects are then given a memory test. The number of nonsense syllables correctly recalled serves as the dependent variable. The data for the two groups (with 5 subjects in each group) are as follows:

Experimental   Control

10

8

12

12

6

8

Control

8

6

4

2

6

10

Math   Statistics-And-Probability   
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