Unit Test
Unit Test Review
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What is the area of the composite figure?
(811 + 6) in.?
(811 + 12) in.?
(811 + 18) in.?
(877 + 24) in.2
3 in

The discrete random variables x and y take integer values with joint probability distribution given by f (x,y) = a(y−x+1) 0 ≤ x ≤ y ≤ 2 or =0 otherwise, where a is a constant. 1 tabulate the distribution and show that a = 0.1.2 find the marginal distributions of x and y. 3 calculate cov(x,y).4 state, giving a reason, whether x and y are independent. 5 calculate e(y|x = 1).