One way to reduce the probability of making a type I error is to ______.
A) make it easier to reject the null hypothesis
B) increase sample size
C) increase alpha
D) lower alpha

Question

Quizplus · Accepted Answer

Lowering the alpha level will decrease the probability of making a type I error. When alpha is lowered, the researcher sets a higher standard for rejecting the null hypothesis, making it more difficult to do so and reducing the likelihood of incorrectly rejecting it. Increasing the sample size can also help to reduce the probability of a type I error, but this is not as effective as lowering the alpha level. Making it easier to reject the null hypothesis (choice A) or increasing alpha (choice C) will increase the likelihood of a type I error.

One Way to Reduce the Probability of Making a Type