Question: 9. In a planned study, there is a known population with a normal distribution, Population M=0, and Population SD=10. What is the predicted effect size

9. In a planned study, there is a known population with a normal distribution, Population M=0, and Population SD=10. What is the predicted effect size if the researchers predict that those given an experimental treatment have a mean of

(a) −8,

(b) −5,

(c) −2,

(d) 0, and

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