Final answer:
Option D: 0.025 is not typically used as a significance level in statistical hypothesis testing, even though it can be used in certain situations. The more conventional significance levels are 0.05, 0.01, and 0.10.
Step-by-step explanation:
The question concerns determining which value is not commonly used as a significance level in statistical hypothesis testing. The significance level, often denoted as alpha (α), is a threshold at which the results of a statistical test are deemed significant. Commonly used significance levels are 0.05, 0.01, and 0.10. While 0.025 is used in certain situations, it is not as conventional as the other options presented.
From the provided information, we can deduce that the standard significance level to assume, if not otherwise specified, is 0.05. So, the answer to which of the given significance levels is not generally used is option D: 0.025. However, it is important to note that the choice of a significance level can vary depending on the context of the study or the standards set within a particular discipline.