The Counternull Statistic Is Useful for Minimizing Which of the Following

Multiple Choice

The counternull statistic is useful for minimizing which of the following common errors (in thinking about effect sizes) ?

A) the ecological fallacy
B) inferring that a failure to reject the null hypothesis also implies an effect size of zero
C) error of equating the rejection of the null hypothesis with having demonstrated a scientifically important effect
D) b and c