Which of the following is an accurate definition for the power of a statistical test?

a.The probability of supporting a false null hypothesis

b.The probability of rejecting a false null hypothesis

c.The probability of rejecting a true null hypothesis

d.The probability of supporting true null hypothesis

A measure of effect size is intended to provide a measurement of the absolute magnitude of a treatment effect.

True

False

A researcher is conducting an experiment to evaluate a treatment that is expected to increase the scores for individuals in a population which is known to have a mean of = 80. The results will be examined using a one-tailed hypothesis test. Which of the following is the correct statement of the null hypothesis?

The alpha level determines the risk of a Type I error.

True

The critical boundaries for a hypothesis test are z = +1.96 and 1.96. If the z-score for the sample data is z = 1.90, then what is the correct statistical decision?

a.Reject H₁

b.Fail to reject H₁

c.Reject H₀

d.Fail to reject H₀

False