When a residual is positive? hoose the correct answer below. OA. A residual is the difference between an observed value of the response variable y and the average value of the response variable. If it is positive, then the response variable greater than the mean. OB. A residual is the difference between an observed value of the response variable y anc the predicted value of y. If it is positive, then the observed value is greater than the predicted value. C. 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 respons variable is greater than the explanatory variable. D. 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.