Question

Alpha refers to __________.

A

Statistical power

B

The probability of making a Type II error

C

The probability of making a Type I error

D

Effect size

Answer 1

alpha refers to probability of making type 1 error which tells the probability of rejecting the null hypothesis when it is true.

When the null hypothesis is true and you reject it, you make a type I error. The probability of making a type I error is α, which is the level of significance you set for your hypothesis test. Suppose for example, an α of 0.05 indicates that you are willing to accept a 5% chance that you are wrong when you reject the null hypothesis.

Correct option is C