NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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What is a Type I error (alpha)?

False negative
True positive
False positive
True negative

The correct answer is: False positive

A Type I error (alpha) occurs when a true null hypothesis is incorrectly rejected. In other words, it is a false positive result where the test concludes that there is an effect or difference when there isn't one in reality. This is why the correct answer is C, false positive. The other options are not correct: A. False negative: This refers to a Type II error, where the null hypothesis is not rejected when it is false. B. True positive: This refers to a correct positive result where the alternative hypothesis is accepted correctly. D. True negative: This refers to a correct negative result where the null hypothesis is not rejected correctly.