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HW8-2

# HW8-2 - ECE 302 Homework#8 Due date 3/23...

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ECE 302, Homework #8. Due date: 3/23 http://www.ece.purdue.edu/ chihw/ECE302 07.html Prof. Chih-Chun Wang Email: [email protected] Office: MSEE354 Office Hours: MWF: 12pm–1pm TA: Kamesh Krishnamurthy, Email: [email protected] Office: POTR 370 Office Hours: M: 10–11am TTh: 10:30am–12:30pm Question 1: Consider X is an exponential random variable with f X ( x ) = ( λe - λx if x 0 0 if x < 0 . Find out the mean and the variance of X . Your answer should be the same as that in Table 3.2, p. 101. Question 2: Consider a binomial random variable X = Y 1 + Y 2 + · · · + Y n , where each Y i is independently Bernoulli distributed with parameter p . We know that X is then a binomial random variable with parameters (

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