You have just completed an experiment in which different subjects were randomly assigned to an experimental and a control group
QUESTION 1 According to the text, a two-tailed test should be useda.unless there is a compelling a priori reason not to.b.if you are sure that the difference between your means is sufficiently large to ensure statistical significance.c.when you are interested in controlling Type II errors but less interested in controlling Type I errors.d.none of […]