18. for the following data: a. find the regression equation for predicting y from x. b. use the regression equation to find a predicted y for each x. c. find the difference between the actual y value and the predicted y value for each individual, square the differences, and add the squared values to obtain ssresidual. d. calculate the pearson correlation for these data. use r2 and ssy to compute ssresidual with equation 16.10. you should obtain the same value as in part c. gravetter, frederick j. statistics for the behavioral sciences (p. 557). cengage learning. kindle edition.