PracticeFinalC4_6

PracticeFinalC4_6 - PracticeFinalpart2 Math160

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Practice Final part 2 Math 160 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Provide an appropriate response. 1) State whether the variable is discrete or continuous. The height of a player on a basketball team A) discrete B) continuous 1) 2) State whether the variable is discrete or continuous. The cost of a Statistics textbook A) discrete B) continuous 2) 3) The random variable x represents the number of cars per household in a town of 1000 households. Find the probability of randomly selecting a household that has less than two cars. Cars Households 0 125 1 428 2 256 3 108 4 83 A) 0.809 B) 0.125 C) 0.428 D) 0.553 3) 4) The random variable x represents the number of credit cards that adults have along with the corresponding probabilities. Find the mean and standard deviation. x P(x) 0 0.07 1 0.68 2 0.21 3 0.03 4 0.01 A) mean: 1.23; standard deviation: 0.44 B) mean: 1.30; standard deviation: 0.32 C) mean: 1.30; standard deviation: 0.44 D) mean: 1.23; standard deviation: 0.66 4) 5) A test consists of 90 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean and the standard deviation of the number of correct answers. A) mean: 45; standard deviation: 6.71 B) mean: 18; standard deviation: 4.24 C) mean: 18; standard deviation: 3.79 D) mean: 45; standard deviation: 3.79 5) 6) A test consists of 10 multiple choice questions, each with five possible answers, one of which is correct. To pass the test a student must get 60% or better on the test. If a student randomly guesses,
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This note was uploaded on 10/19/2011 for the course MATH 201 taught by Professor R during the Fall '11 term at Lee.

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PracticeFinalC4_6 - PracticeFinalpart2 Math160

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