What does a researcher's level of significance represent?

Question

Quizplus · Accepted Answer

Recall that the p value attached to a calculated statistic represents its level of significance (or alpha level) or the probability that the outcome occurred by chance. The actual p value attached to a statistic indicates the Type I error rate if the null hypothesis is rejected. The other two answers are incorrect. A Type II error is related to power, which is the probability that a statistical test will detect a difference or relationship, if one exists. The clinical significance of a difference might be indicated by the actual magnitude of the difference between measures.

What Does a Researcher's Level of Significance Represent