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Question
(p. 383, 386) (a) What is a Type I error and what is a Type II error when using NHST? (b) Which is more common in psychological research?
(a) Decisions about the outcome of an experiment are based on probabilities. A Type I error occurs when researchers rejecting a true null hypothesis (i.e., there is no difference between population means but a difference is claimed). A Type II error occurs when researchers fail to reject a false null hypothesis (i.e., a true difference between population means is missed). (b) Type II errors are more common in psychological research because many studies have low statistical power.
Answer
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Related questions
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