The alpha level is
A)usually determined while analyzing experimental data.
B)the chance of obtaining an inconclusive result when the research hypothesis is true.
C)the probability of a Type I error.
D)always set at 1%.

Question

Quizplus · Accepted Answer

The alpha level, also known as the significance level, is the probability of making a Type I error, which occurs when a researcher rejects a null hypothesis that is actually true. It is usually set at 0.05 or 0.01, but can be adjusted based on the specific study design and research questions. Option A is incorrect because the alpha level is determined before conducting the study, not during analysis. Option B is incorrect because an inconclusive result does not necessarily mean that the research hypothesis is true. Option D is incorrect because the alpha level is not always set at 1%.

The Alpha Level Is