When an independent variable, that has a positive correlation with the dependent variable, receives a negative slope in a multiple regression, this is probably caused by multicollinearity.

Question

Quizplus · Accepted Answer

Multicollinearity occurs when independent variables in a regression model are highly correlated. This can lead to counterintuitive results, such as a variable that has a positive correlation with the dependent variable showing a negative coefficient in the regression model, because it is not accounting for the effect of other correlated independent variables properly.

When an Independent Variable, That Has a Positive Correlation with the Dependent