The power of a hypothesis test is the probability that the sample mean will be in the critical ...

The power of a hypothesis test is the probability that the sample mean will be in the critical region even if the treatment has no effect.
 
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Question 2

Although the size of the sample can influence the outcome of a hypothesis test, it has little or no influence on measures of effect size.
 
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Question 3

It is possible for a very small treatment effect to be a statistically significant treatment effect.
 
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Question 4

The value obtained for Cohen's d is independent of the sample size.
 
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