What is a residual What does it mean when a residual is positive Choose the correct answer below OA A residual is the difference between an observed value of the response variable y and the predicted value of If it is positive then the observed value is greater than the predicted value OB A residual is the difference between an observed value of the response variable y and the average value of th response variable If it is positive then the response variable is greater than the mean OC A residual is the difference between an observed value of the response variable y and the value of the corresponding explanatory variable x If it is positive then the response variable is greater than the explanato variable OD A residual is a data point that does not fit the pattern of the rest of the data If it is positive then the data point should still be included in the data set