Reducing the probability of a Type II error decreases the probability of a Type I error.

Question

Quizplus · Accepted Answer

This statement is incorrect. Reducing the probability of a Type II error (false negative) may increase the probability of a Type I error (false positive) and vice versa. The balance between these two types of errors is often determined by the chosen level of significance and power of the statistical test. Decreasing one type of error usually requires increasing the risk of the other type of error.

Reducing the Probability of a Type II Error Decreases the Probability