Consider a regression study involving a dependent variable y, a quanttative independent variabe nd s categoal independent vanae wth teee level 1 and x -1 for level 2.) MY NOTES AKORACHR (a) Write a multiple regression equation relating , and the categorical vanatle toy Ey) - + h EY) - + (b) What is the expected value of y corresponding to level 1 of the categorical variable? Ey I level 1) - () What is the expected value of y corresponding to level 2 of the categorical varatie? Ely I level 2) - (d) Interpret the parameters in your regression equation. holding , constant. represents the difference in the expected value of y for level and

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