Social Studies, 29.08.2019 19:00, 22mhenton

Aresearcher tested a treatment and a control group in an experiment with 15 subjects in each group. although a t-test indicated the means for the dependent variable were not statistically different, the effect size for the independent variable was .50. a power analysis revealed that the power of the study was .26. this means that
a) the difference between means in the experiment was 26
b) the value of the t-statistics is 0.13(0.50*0.26)
c) a statistically significant outcome would be obtained in approximately 1 in 4 attempts with this sample size and effect size
d) the probability of obtaining a statistically significant difference for this experiment is .74(1-.26)

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Aresearcher tested a treatment and a control group in an experiment with 15 subjects in each group....