5. a) [6 marks] Suppose a group of 900 smokers (who all wanted to quit smoking)...

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5. a) [6 marks] Suppose a group of 900 smokers (who all wanted to quit smoking) were randomly assigned to receive an antidepr

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peralne 10.2033 population : n l drug ) lug 23 = 23 lug -0.issy 752 97. 2 (placebo) B 97 20.1299 752 Total 900 120 P2120 -0.1

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