Statistics

#1- The normal distribution had a mean of 14 and standard deviation of 4. There were 30 people in the study group and the average was expected to be 16. The study was tested at the .05 level of significance. What was the power of the study?

74.2%
80.5%
86.4%
92.7%

#2- If a sample with a mean of 60 has an estimated effect size of 2, is that effect size small, medium, or large?

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