What does a ".05 level of significance" mean?
A) A result is considered significant if it would occur 5 (or fewer) times out of 100 when the null hypothesis is true.
B) There is a 5% chance that the null hypothesis is true.
C) There is a 5% chance of proving your results.
D) There is a 5% chance of making a Type II error.

Question

Quizplus · Accepted Answer

A .05 level of significance means that there is a 5% probability of observing the data, or something more extreme, assuming the null hypothesis is true. This is the threshold for rejecting the null hypothesis.

What Does a ".05 Level of Significance" Mean