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probex
Course: STAT 302, Fall 2008School: Texas A&M
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is X a discrete r.v. with the following distribution: X p(x) X = Xp(X) 2X = (X-)2p(X) What is X? What is 2X? How likely are we to get a 2 if we sample from this distribution? P(X = 2) = P(X 2) = P(X < 2) = How likely are we to get two 2's if we sample randomly? P(X1=2 and X2=2) = How likely are we to get a 0 or a 3? P(X = 0) ? P(X = 3) = -1 0.4 0 2 0.1 0.3 3 What are these probabilties for the standard...
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is X a discrete r.v. with the following distribution: X p(x) X = Xp(X) 2X = (X-)2p(X) What is X? What is 2X? How likely are we to get a 2 if we sample from this distribution? P(X = 2) = P(X 2) = P(X < 2) = How likely are we to get two 2's if we sample randomly? P(X1=2 and X2=2) = How likely are we to get a 0 or a 3? P(X = 0) ? P(X = 3) = -1 0.4 0 2 0.1 0.3 3
What are these probabilties for the standard normal, Z ~ N(0, 12)? P(- < Z < 1) = 1 P(- < Z < 2) = 2 P(- < Z < 3) = 3 What is the 85th %tile? P(Z < z0.15) = What z has 33% above ...
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