A Researcher Is Concerned About the Power of a Study

question 9

Multiple Choice

A researcher is concerned about the power of a study. The researcher's planned interventional study examines the effect upon depression of instituting twice-yearly trips with the Road Scholar travel program for widows and widowers who have, 1 to 2 years before, lost a spouse to a long illness. What strategies could make Type II error less likely?

• A)Decreasing the effect size
• B)Increasing the alpha from 0.05 to 0.10
• C)Increasing the beta from 0.20 to 0.30
• D)Decreasing the beta from 0.20 to 0.10
• E)Decreasing the alpha from 0.05 to 0.025
• F)Increasing the sample size