At the 1 Percent Level of Significance, the Number of Degrees

Multiple Choice

At the 1 percent level of significance, the number of degrees of freedom for a t-test is _____, and the critical value of the t-statistic is ________. Only parameter estimate(s) ________ is (are) NOT statistically significant at the 1 percent level of significance.

A) 30; 2.457; $\hat { a }$
B) 30; 2.750; $\hat { a }$
C) 34; 2.042; $\hat { c }$
D) 34; 2.042, $\hat { a }$ and
$\hat { c }$