If a simple least squares regression model is developed based on sample where the two variables are known to be positively correlated,the sum of the residuals will be positive.

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The sum of the residuals may be positive, negative, or zero, depending on the distribution of the data points around the regression line. There is no predetermined direction of the sum of the residuals in a least squares regression model.

If a Simple Least Squares Regression Model Is Developed Based