Given the below is a bivariate distribution for the random variables x and y. Economic Scenario Probability of Occurrence Stock Fund (x) Bond Fund (y) Recession 0.10 -40 30 Weak Growth 0.25 5 5 Stable Growth 0.50 15 4 Strong Growth 0.15 30 2   Compute the expected value and the variance of x and y. Develop a probability distribution for x+y. Using the results of part (b), compute E(x+y) and Var(x+y). Compute the covariance and correlation for x and y. Are x and y positively related, negatively related, or unrelated?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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  1. Given the below is a bivariate distribution for the random variables x and y.

Economic Scenario

Probability of Occurrence

Stock Fund (x)

Bond Fund (y)

Recession

0.10

-40

30

Weak Growth

0.25

5

5

Stable Growth

0.50

15

4

Strong Growth

0.15

30

2

 

  1. Compute the expected value and the variance of x and y.
  2. Develop a probability distribution for x+y.
  3. Using the results of part (b), compute E(x+y) and Var(x+y).
  4. Compute the covariance and correlation for x and y. Are x and y positively related, negatively related, or unrelated?
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ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,