Chapter 3 HW - 0.3 = 3/10 3.17 The probability is 0.05 3.19...

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Xavier Baquero 10-0126 Statistics I Friday, June 11 th , 2010 Professor Nicolas Chapter 3: Homework Pages 123-125 Exs. 3.1-3.25 (Odds) 3.1 An experiment is an act or process of observation that leads to a single outcome that cannot be predicted with certainty. 3.3 The sample space of an experiment is the collection of all its sample points. 3 .5 Two probability rules for Sample Points: All sample point probabilities must lie between 0 and 1. The probabilities of all the sample points within a sample space must sum to 1. 3.7 The probability of the event that contains several sample points is the sum of the probabilities of the sample points. 3.9 a. The P(E 3 ) = .5 b. The P(E 3 ) = .3 c. The P(E 3 ) = .6 3.11 A. {Either 1,2,3 occur}: .55 B. {Either 1,3,5 occur}: .5 C. {4 does not occur}: .7 3.13 A. n = 2, N = 5 Answer: 10

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B. n = 3, N = 6 Answer: 20 C. n = 5, N = 20 Answer: 15,504 3.15 a. and b. c. A. {Two blue marbles are drawn} = 0.1 = 1/10 B. {A red and a blue marble are drawn} = 0.6 = 6/10 C. {Two red marbles are drawn} =

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Unformatted text preview: 0.3 = 3/10 3.17 The probability is 0.05. 3.19 a. 0.01 b. Yes. 3.21 a. The probability is 49/188, or 0.26. (R 1 ,B 1 ) 1/10 (R 1, B 2) 1/10 (R 2 ,B 1) 1/10 (R 2 ,B 2) 1/10 (R 3, B 1) 1/10 (R 3, B 2) 1/10 (R 1, R 2) 1/10 (R 1, R 3) 1/10 (R 2, R 3) 1/10 (B 1, B 2) 1/10 b. Table: Fungus-damaged Area Pobability Trunk .85 Branch .5 Leaves .1 3.23 a. Outcomes: i. Interview ii. Observation plus iii. Participation iv. Observation only v. Grounded Theory b. Because some categories have a larger amount of outcomes than others, they don’t have the same values. c. Table: Fieldwork Method Number of papers Interview 0.67 Observation plus 0.13 Participation Observation Only 0.11 Grounded Theory 0.07 d. The probability is 0.74. 3.25 a. and b. Grill Display Combination Number of Students 1-2-3 0.28 1-2-4 0.06 1-2-5 0.33 2-3-4 0.03 2-3-5 0.008 2-4-5 0.27 c. The probability of Grill #1 is 0.67....
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Chapter 3 HW - 0.3 = 3/10 3.17 The probability is 0.05 3.19...

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