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An instructor has given a short quiz consisting of two parts. For a randomly selected student, let X = the number of points earned on
An instructor has given a short quiz consisting of two parts. For a randomly selected student, letX= the number of points earned on the first part andY= the numberof points earned on the second part. Suppose that the joint pmf ofXandYis given in the accompanying table.
y | |||||
p(x,y)
| 0 | 5 | 10 | 15 | |
x | 0 | 0.03 | 0.06 | 0.02 | 0.10 |
5 | 0.04 | 0.14 | 0.20 | 0.10 | |
10 | 0.01 | 0.15 | 0.14 | 0.01 |
(a) Compute the covariance forXandY. (Round your answer to two decimal places.) Cov(X,Y) = (b) ComputeforXandY. (Round your answer to two decimal places.)
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