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A researcher asks whether a cold medication interferes with cognition. A standardized test containing a variety...

A researcher asks whether a cold medication interferes with cognition. A standardized test containing a variety of problem-solving tasks is normally distributed with μ = 64. A random sample of n = 25 subjects is given the drug and then tested (M = 57, SD=9). Does the data show that the medication decreases performance in a one-tail, one-sample t test (α’ =.05)?
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