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  3. an instructor has given a short quiz consisting of

An instructor has given a short quiz consisting of two parts. For a randomly selected student,...

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Statistics

An instructor has given a short quiz consisting of two parts.For a randomly selected student, let X = the number ofpoints earned on the first part and Y = the number ofpoints earned on the second part. Suppose that the joint pmf ofX and Y is given in the accompanying table.

y

p(x,y)

  		051015
x00.010.060.020.10
50.040.160.200.10
100.010.150.140.01

(a) Compute the covariance for X and Y. (Roundyour answer to two decimal places.)
Cov(X, Y) =

(b) Compute ρ for X and Y. (Round youranswer to two decimal places.)
ρ =

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