The data were used to fit a least-squares regression line to predict the number of hours of pain relief for a given dose. Which of the following would be revealed by a plot of the residuals of the regression versus the dose? The variation in the hours of pain relief is not the same across the doses. , Not Selected The sum of the residuals is less than 0. , Not Selected Incorrect There is a positive linear relationship between the residuals and the dose. The sum of the residuals is greater than 0. , Not Selected There are outliers associated with the lower doses.