1. In regression the proportion or percent of the total variance in the data tha

ID: 3320418 • Letter: 1

Question

1. In regression the proportion or percent of the total variance in the data that is explained by equation is given by the

a. Intercept significance

b. F-test

c. R2

d. Intercept value

2. A researcher can discover whether variables X1 and X2 interact by

a. Dividing the f-test value by their p-values

b. Re-running the regression after adding variable X1X2 and seeing if its coefficient is significant

c. Determining if the product of their coefficients exceeds 100

d. Seeing if the residual plot is curved

3. A regression equation whose independent (X) variables includes first power Xs, squared Xs, and X1 times X2 is called a/an _______ equation.

a. Complete

b. First-order

c. Quadratic

d. Interactive

Q1) Option C is Correct. R2

Q2) Option C is Correct. Re-running the regression after adding variable X1X2 and seeing if its coefficient is significant

Q3) Option D is Correct. Interactive

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