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Question: 5 4 pts let xbernoullip define z 3x1 a is...

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(5) [4 pts] Let XBernoulli(p). Define Z 3x-1. (a) Is Z a random variable? Why? (b) Show that E[Z] 2p (c) Show that Elz?] 4p. (d) What is the variance of Z?

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