A Research Group Conducted a Placebo-Controlled Clinical Trial to Assess

A research group conducted a placebo-controlled clinical trial to assess whether a new drug to treat acute migraine with or without aura in adults is more effective than standard therapy.  A total of 3,500 patients with acute migraine were enrolled in the study and randomly assigned to either the new drug or standard treatment.  During the data analysis phase, the researchers decide to set alpha at 0.01 rather than 0.05.  Which of the following is the most likely result of this change?

A) Any significant findings will be reported with greater confidence
B) There will be a higher probability of a type I error
C) There will be a higher probability of finding statistically significant results
D) There will be a lower probability of a type II error
E) The study will have more statistical power

Correct Answer:

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