When the probability of a Type I error is 0.05 or less, we say that we have observed _____.
A)a Type II error
B)statistical significance
C)the alternative hypothesis
D)all of the above

Question

When the probability of a Type I error is 0.05 or less, we say that we have observed _____.​
A)a Type II error​
B)statistical significance
C)the alternative hypothesis
D)all of the above

Quizplus · Accepted Answer

When the probability of a Type I error is 0.05 or less, we say that we have observed statistical significance. This means that the results are unlikely to have occurred by chance and are therefore meaningful. Choice A (a Type II error) is a situation in which we fail to reject a null hypothesis when it is actually false, and is unrelated to a Type I error rate. Choice C (the alternative hypothesis) is not the correct answer because it is a hypothesis that we are trying to accept, rather than a conclusion we can draw from our results. Choice D (all of the above) is not the best choice because only option B is correct.

When the Probability of a Type I Error Is 0