Question

explain how to find the critical values for a t - distribution. click the icon to view the t - distribution table. give the first step. choose the correct answer below. a. identify the level of significance ( 1-alpha ) and the degrees of freedom, d.f. ( =n ). b. identify the level of significance ( \frac{alpha}{2} ) and the degrees of freedom, d.f. ( =n - 1 ). c. identify the level of significance ( alpha ) and the degrees of freedom, d.f. ( =n - 1 ). d. identify the level of significance ( \frac{1-alpha}{2} ) and the degrees of freedom, d.f. ( =n ).

Explanation:

To find critical values for a t - distribution, first, we need to know the significance level ($\alpha$) which represents the probability of making a Type I error (rejecting a true null hypothesis). For a t - distribution, the degrees of freedom (d.f.) is calculated as \(n - 1\) where \(n\) is the sample size.

Answer:

C. Identify the level of significance \(\alpha\) and the degrees of freedom, d.f. \(=n - 1\).