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To test the effectiveness of a drug to relieve asthma, a group of subjects was randomly given
a drug and placebo on two different occasions. After 1 hour an asthmatic relief index was
obtained for each subject, with these results:
(Low numbers are good!) Is the drug more effective?

Subject 1 2 3 4 5 6 7 8 9
Drug 28 31 17 22 12 32 24 18 25
Placebo 32 33 19 26 17 30 26 19 25