Week 1 Graded Assignment

Graded assessment for Week 1.

Deadline: Sunday, 11:59 PM

Problem 1 (5 points)

Let $X$ be a random variable with PMF: $P(X=1) = 0.2$ , $P(X=2) = 0.3$ , $P(X=3) = 0.5$ . Calculate the variance of $X$ , $Var(X)$ .

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Given a joint PMF table for independent variables $X$ and $Y$ , fill in the missing value $k$ .

X \ Y	1	2
1	0.1	0.2
2	0.3	$k$

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