An example of a first-order model with two predictor variables is
a. y = 0 + 1x1 +
b. y = 0 + 1x1 + 2x2 +
c. y = 0 + 1x2 +
d. y2 = 0 + 1x1 + 2x2 +
Question 2
In a crosstabulation, _____.
a. both variables must be categorical
b. both variables must be quantitative
c. one variable must be categorical and the other must be quantitative
d. either or both variables can be categorical or quantitative
