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Condition improved I No change N Condition worse W Total c P I Assume that...

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Condition improved I No change N Condition worse W Total c P I Assume that a participant is selected at random Let M be the event that the participant used the medication L the event that the participant used th placebo I the event that the participant s condition improved and so on as shown by the letters in the headings a P I M Check Clear Give the exact answer not a decimal approximation Check Clear Used medication M Used placebo L 20 280 340 2500 40 2820 400 5600 b P M I Give the exact answer not a decimal approximation Check Clear d P M Give the exact answer not a decimal approximation Check Clear Give the exact answer not a decimal approximation e Test the events I and M for independence O Independent O Dependent Total 300 2840 2860 6000 O Independent

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