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# 14111cwir9ws.1 - 2. An experiment consists of ±ipping a...

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Fall 2011 Math 141 Week-in-Review #9 Exam 3 Review courtesy: Kendra Kilmer (covering Sections 7.2-7.6 and 8.1-8.4) (Please note that this review is not all inclusive) 1. Classify each of the following random variables as Fnite discrete, inFnite discrete, or continuous. (a) An experiment consists of testing the bottling accuracy of a 20 ounce coke. Let X represent the actual amount of liquid in a 20 ounce bottle of coke. (b) An experiment consists of selecting marbles without replacement from a bowl that contains 10 yellow, 13 green, and 8 red marbles. Let Z represent the number of marbles selected until a green marble is drawn. (c) An experiment consists of selecting marbles with replacement from a bowl that contains 10 yellow, 13 green, and 8 red marbles. Let X represent the number of marbles selected until a green marble is drawn. (d) Let Y represent the amount of time that it takes to complete the San Antonio Half-Marathon.
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Unformatted text preview: 2. An experiment consists of ±ipping a fair coin 5 times. Let the random variable X represent the number of times the coin lands on heads. (a) ²ind the probability distribution of X . (b) Draw the histogram for the random variable X . (c) ²ind P ( X > 3) 3. An experiment consists of randomly selecting a sample of 4 radios out of a bin containing 30 radios, of which 6 are defective. Let the random variable Y represent the number of defectives in the sample. ²ind the probability distribution of Y . 4. Jack and Jill decide to play a game. Jill rolls a pair of fair six-sided dice. If the sum of the numbers is less than 4, Jill pays Jack \$1. If the sum of the numbers is greater than 9, Jack pays Jill \$10. Otherwise, Jill pays Jack \$ A . ²ind the value of A that makes this game fair....
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## This note was uploaded on 03/04/2012 for the course MATH 141 taught by Professor Jillzarestky during the Fall '08 term at Texas A&M.

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