A Type I error probability is represented by ; it is the probability of incorrectly rejecting a null hypothesis that is true.

Question

A Type I error probability is represented by  ; it is the probability of incorrectly rejecting a null hypothesis that is true.

Quizplus · Accepted Answer

A Type I error occurs when we reject a null hypothesis that is actually true. It is also known as a false positive or alpha error. The probability of committing a Type I error is denoted by the symbol alpha (α) and is usually set at a significance level of 0.05 or 0.01.

A Type I Error Probability Is Represented by ;