**13.** The standard error of the estimate (S_{e}) is essentially the ____.

A) 0.901

B) 0.888

C) 0.800

D) 0.953

E) 0.894**7.**

In linear regression, a *dummy** variable* is used ____.

Which of the following is ** not** one of the assumptions of regression?

In the standardized value (*b*_{i} – β_{i}) / *s*_{bi}, the symbol *s*_{bi} represents the ____.

A) mean of *b*_{i}

B) variance of *b*_{i}

C) standard error of *b*_{i}

D) degrees of freedom of *b*_{i}**12.**