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 $\frac{\alpha}{2}$ and the degrees of freedom, d.f. = n - 1. b. identify the level of significance $\alpha$ and the degrees of freedom, d.f. = n - 1. c. identify the level of significance $\frac{1 - \alpha}{2}$ and the degrees of freedom, d.f. = n. d. identify the level of significance 1 - $\alpha$ and the degrees of freedom, d.f. = n. find the critical value(s) using the given t - distribution table in the row with the correct degrees of freedom. if the hypothesis test is left - tailed, use the \one tail, $\alpha$\ column with a negative sign. if the hypothesis test is right - tailed, use the column with a sign.

Explanation:

To find the critical value for a right - tailed t - distribution test:

• The level of significance used in the t - distribution table for one - tailed tests is \(\alpha\). So we use the "One tail, \(\alpha\)" column.
• Since it is a right - tailed test (where we are interested in the upper tail of the distribution), the critical value is positive.

Answer:

If the hypothesis test is right - tailed, use the "One tail, \(\alpha\)" column with a positive sign.