Rather than use a dummy variable (D, coded as 1 for men and 0 for women) as the explanatory variable in the regression of responses of men and women, a model that includes an explanatory variable X coded as + 1 for men and -1 for women was used. (This type of indicator variable is sometimes used rather than a dummy variable.) Answer parts (a) through (d). (a) What is the difference between the scatterplot of Y on X from the scatterplot of Yon D? A. The scale on the y-axis changes. The y-axis in the plot of Yon D goes from 0 to 1 while the y-axis on the plot of Y on X goes from - 1 to 1. B. The scale on the x-axis changes. The x-axis in the plot of Y on D goes from 0 to 1 while the x-axis on the plot of Y on X goes from - 1 to 1. C. There is one more possible x-value in the plot of Yon X. In Yon D the only possible x-values are 0 and 1, while in Yon X, - 1 is also a possible x-value. D. Since the range of values increases, the variation within each category increases