A statistical test led Dr. Jones to incorrectly decide that his independent variable had no effect when in fact it did. Dr. Jones committed a(n):
A) Type I error.
B) Type II error.
C) Type III error.
D) alpha error.

Question

Quizplus · Accepted Answer

A Type II error occurs when a statistical test fails to reject the null hypothesis when it is actually false. In this case, Dr. Jones' test led him to conclude that his independent variable had no effect when in fact it did, which is a Type II error.

A Statistical Test Led Dr