Question

In a study on hypertension the level of significance is set at an alpha of 0.5. This alpha level indicates?

A. The intercept of the regression line used in statistical analyses

B. The internal consistency of measures of the dependent variable

C. The probability of type I error the researchers are willing to accept

D. The area under the curve past the test statistic

Answer 1

Here' the answer with proper explanation. Let me know in case you've not understood any part of it.

The alpha is the level of significance which basically puts down the threshold of type 1 error that researcher are willing to take in order to prove disprove a hypothesis.

It is the probability of rejecting the null hypothesis given that it is true - also called the type 1 error. This should be as small as possible

Hence, the correct answer is C.