CH5_PPT FA08

CH5_PPT FA08 - Chapter 5 Discrete Probability Distributions...

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Chapter 5 Discrete Probability Distributions Section 5-2 Probability Distributions
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Section 5-2 Exercise #19 Chapter 5 Discrete Probability Distributions
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X P ( X ) 6 15 0 5 15 1 3 15 2 1 15 3 The probabilities that a patient will have 0 , 1 , 2 , or 3 tests performed on entering a hospital are 6 15 , 5 15 , 3 15 , 1 15 and 1 15 respectively. Construct a probability distribution for the data and draw a graph for the distribution.
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Section 5-2 Exercise #27 Chapter 5 Discrete Probability Distributions
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A box contains two $1 bills, three $5 bills, one $10 bill, and three $20 bills. Construct a probability distribution for the data. X $1 $5 $10 $20 P ( X ) 2 9 1 3 1 9 1 3
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Section 5-2 Exercise #29 Chapter 5 Discrete Probability Distributions
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Construct a probability distribution for drawing a card from a deck of 40 cards consisting of 10 cards numbered 1 , 10 cards numbered 2 , 15 cards numbered 3 , and 5 cards numbered 4 . X 1 2 3 4 P ( X ) 1 4 3 8 1 8 1 4
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Section 5-3 Exercise #3 Chapter 5 Discrete Probability Distributions
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A bank vice president feels that each savings account customer has, on average, three credit cards. The following distribution represents the number of credit cards people own. Find the mean, variance, and standard deviation. Is the vice president correct? Number of cards X 0 1 2 3 4 Probability P ( X ) 0.1 8 0.4 4 0.2 7 0.0 8 0.0 3
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μ = X P ( X ) = 0(0.18) + 1(0.44) + 2(0.27) + 3(0.08) + 4(0.03) = 1.34or1.3 A bank vice president feels that each savings account customer has, on average, three credit cards. The following distribution represents the number of credit cards people own. Find the mean, variance, and standard deviation. Is the vice president correct? Or You can complete it in table form. See slide #14
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2 = X 2 P ( X )– μ 2 = [0 2 (0.18) + 1 2 (0.44) + 2 2 (0.27) + 3 2 (0.08) + 4 2 (0.03)]–1.34 2 = 0.92or0.9 A bank vice president feels that each savings account customer has, on average, three credit cards. The following distribution represents the number of credit cards people own. Find the mean, variance, and standard deviation. Is the vice president correct? Or
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CH5_PPT FA08 - Chapter 5 Discrete Probability Distributions...

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