If, After Power Analysis, a Researcher's Interventional Study Findings Are

If, after power analysis, a researcher's interventional study findings are nonsignificant, what might this imply?

A) The effect size was smaller than originally expected.
B) The effect size was larger than originally expected.
C) The operational definition of the independent variable was faulty.
D) The operational definition of the dependent variable was faulty.
E) A Type I error occurred.
F) A Type II error occurred.
G) The intervention was not an effective one.

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