Question

A research team interested in the proportion of patients at a local hospital that are admitted to the emergency room without any form of healthcare insurance. Suppose the team hypothesizes that the proportion of these patients was 19%, and conducted a sample of 298 participants to find that 109 were without any insurance at 95% confidence.

A) What was the power of the test conducted?

B) Suppose the research team were to have sampled 658 participants and found the same proportion was without insurance coverage. What would the power be for that test?

C) Discuss the effect of increasing sample size on power with respect to the above two responses.

		A) 95% Power B) The power would only increase, beyond 95%                 C) As you increase the overall sample size, the power of the study to detect a difference only decreases
		A) 99.9% Power B) The power would only increase, beyond 99.99%                  C) As you increase the overall sample size, the power of the study to detect a difference only increases.
		A) 100% Power B) The power would only increase, to 100%                 C) As you increase the overall sample size, the power of the study to detect a difference only increases.

Answer 1