A researcher conducts a study,but has low power to detect an effect.Which of the following is one way in which the research can increase power?
A)Make the alpha level smaller.
B)Increase the sample size.
C)Study a population with a larger standard deviation.
D)Conduct the study again with the same sample size.

Question

Quizplus · Accepted Answer

Increasing the sample size will increase power by reducing the standard error and increasing the likelihood of detecting a true effect. A smaller alpha level would increase the likelihood of a false negative, while studying a population with a larger standard deviation would increase the variability and make it more difficult to detect an effect. Conducting the study again with the same sample size would not increase power, as the sample size would still be too small to detect an effect.

A Researcher Conducts a Study,but Has Low Power to Detect