Refer to Exercise 42. Compute the covariance between x and y and then the value of the popu- lation correlation coefficient. Do these two vari- ables appear to be strongly related? Explain.

I mostly need help with part C of 42 and question 45.  This is ungraded homework.

Extracted text: Refer to Exercise 42. Compute the covariance between x and y and then the value of the popu- lation correlation coefficient. Do these two vari- ables appear to be strongly related? Explain.


Extracted text: 42. A large insurance agency provides services to a number of customers who have purchased both a homeowner's policy and an automobile policy. For each type of policy, a deductible amount must be specified. Let x denote the homeowner's deductible amount and y denote the automobile deductible amount for a customer who has both types of poli- cies. The joint mass function of x and y is as follows: y auto f(x, y) 250 500 200 .20 .10 .20 me 500 .05 .15 .30 a. What proportion of customers have $500 de- ductible amounts for both types of policies? b. What proportion of customers have both de- ductible amounts less than $500? c. What is the marginal mass function of x? What is the marginal mass function of y?