Ethan concludes that there is no difference in the driving ability of drivers who have consumed one can of beer and those who have consumed three cans of beer. However, there actually is a difference in the driving ability of the drivers. In this case, Ethan has made a(n) _____ error.
A)null
B)alpha
C)Type I
D)Type II

Question

Quizplus · Accepted Answer

Ethan has made a Type II error, which occurs when one fails to reject a false null hypothesis, meaning he incorrectly concluded there is no effect or difference when there actually is one.

Ethan Concludes That There Is No Difference in the Driving