An explicit specification of a set of variables and their interrelationships designed to represent some real system or process in whole or in part is called a(n) ________

An executive summary of a formal report is usually no longer than __________ percent of the original document.

a. 1 b. 5 c. 10 d. 15

If there is NO correlation between 2 variables, the correlation coefficient is ____.

A) 1 B) 0 C) -1 D) None of the given answer