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Researchers studying how adults respond to the addition of additives to their pain medication design a study where volunteers(b) If the researchers were trying to test for a difference in the level of stomach discomfort between the two groups, what sA European pharmaceutical company is interested in whether the apparent side- effects of a newly developed (but widely used)

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Answer #1

1. a) Answer C. Multi-treatment design

b) Answer C. Two sample t test

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2. a) Answer B. Linear regression.

b) Answer B. Two tailed

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