How many coefficients need to be estimated in the quadratic regression model?
A) 4
B) 3
C) 2
D) 1

Question

Quizplus · Accepted Answer

In a quadratic regression model, we have one dependent variable (y), one independent variable (x), and one squared independent variable (x^2). Therefore, we need to estimate the coefficients for the linear and quadratic terms, which gives us a total of 3 coefficients to estimate: y-intercept, slope for x, and coefficient for x^2. Thus, the best choice is B.

How Many Coefficients Need to Be Estimated in the Quadratic