Serious violations of one or more of the assumptions underlying parametric inferential tests:
A) have little effect on the validity of a statistic.
B) will lead one to commit a Type I error either more or less often than the stated alpha probability.
C) affect Type I error rates but not Type II error rates.
D) affect Type II error rates but not Type I error rates.

Question

Quizplus · Accepted Answer

Serious violations of assumptions can affect the Type I error rate, causing it to deviate from the nominal alpha level, leading to either an increased or decreased likelihood of committing a Type I error.

Serious Violations of One or More of the Assumptions Underlying