I am going to answer the sample USMLE Step 1 Questions with Explanation. These questions are available at USMLE.org
Investigators conduct a study that evaluates the effect of finasteride on the incidence of prostate cancer in 500 patients. The investigators recruit an additional 1000 patients for the study.
Which of the following effects will this have on the research study?
(A) Greater chance of a Type I error
(B) Greater chance of a Type II error
(C) Less chance of a Type I error
(D) Less chance of a Type II error
(E) Impossible to predict
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