Define the level of significance.
A)It is the probability of a Type II error.
B)It is the probability of a Type I error.
C)It is a z-value of 1.96.
D)It is the beta error.

Question

Quizplus · Accepted Answer

The level of significance, also known as alpha level, is the probability of making a Type I error, which is rejecting a true null hypothesis. It is usually set at 0.05 or 0.01, depending on the context and the level of certainty desired. Therefore, option B is the correct choice. Option A refers to the power of the test, which is the probability of detecting a true difference. Option C refers to the critical value of a z-test for a two-tailed test with alpha = 0.05. Option D refers to the probability of making a Type II error, which is related to power and the effect size.

Define the Level of Significance