Throw a pair of fair 4-sided dice, and take X to be the sum of the numbers facing up. Fill in the indicated values of the partial probability distribution table. The other missing values appear when you correctly answer the question (or press "Do it"). 2 2 3 4 5 6 7 8 P(X = x) Q How well does the line approximate the data? Check Clear Help! Do it A If we use the equation of the line to calculate the y-coordinates, we get slightly different values, called predicted values (for which we use the symbol ) from the original observed values shown in the table.