Answer the following questions about joint random variables. (a) When considering the correlation coefficient, does it measure a linear, quadratic, or cubic relationship between the variables? (b) When considering the correlation coefficient, how can you tell if there is a positive relationship, negative relationship, or no relationship between the variables? (c) Suppose we find that the joint probability distribution of X and Y to be x + 2y f(x, y) for x = 0, 1, 2; y= 1,2,3, 4. 72 you were to find the marginal distribution of Y, what would be the sum of the probabilities for the random variable Y be, and why? If

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