The primary tool for determining whether the assumptions made about the regression model are appropriate is
A) interval estimation.
B) significance testing.
C) least squares regression.
D) residual analysis.

Question

The primary tool for determining whether the assumptions made about the regression model are appropriate is
A) ​interval estimation.
B) ​significance testing.
C) ​least squares regression.
D) ​residual analysis.

Quizplus · Accepted Answer

Residual analysis is the primary tool for determining whether the assumptions made about the regression model are appropriate. Residual analysis involves examining the patterns of the residuals (the differences between the observed values and the predicted values) to check for violations of assumptions such as linearity, normality, and constant variance. Interval estimation and significance testing are used for hypothesis testing and constructing confidence intervals for population parameters, while least squares regression is the method used to estimate the coefficients of the regression equation.

The Primary Tool for Determining Whether the Assumptions Made About