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If an organization buys 10 of these appliances

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Unformatted text preview: a study conducted by UCLA, it was found that 25% of college freshmen support increased military spending. If 6 college freshmen are randomly selected, find the probability that: Only 1 support increased military spending A. .0330 B. .1318 C. .3560 D. .7844 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Binomial 47. A multiple-choice test has 30 questions and each one has five possible answers, of which one is correct. If all answers were guesses, find the probability of getting exactly four correct answers. A. .0604 B. .1325 C. .2552 D. .8000 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Discrete Probability Distribution 1-397 Chapter 01 - An Introduction to Business Statistics 48. It is known that 15% of all college freshmen at Ivey University leave after their first year. Calculate the interval that contains 99.73% of the students who remain if we are looking at a random sample of 300 Ivey University freshmen. A. [236.45 273.55] B. [26.45 63.55] C. [110.25 369.75] D. [38.82 51.18] AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Binomial 49. The variable "employment status" which can take on one of two values: 1 for "employed" and 0 for "unemployed" is an example of a _____________ random variable. A. Poisson B. Discrete C. Hypergeometric D. Continuous AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Discrete Random Variable 50. If x is a binomial random variable, then the standard deviation of x is given by A. np B. (npq)2 C. √npq D. npq AACSB: Analytical Studies Bloom's: Knowledge Difficulty: Medium Topic: Binomial 1-398 Chapter 01 - An Introduction to Business Statistics 51. A random variable that is defined to be the total number of successes in n trials is a _____ random variable. A. Binomial B. Poisson C. Hypergeometric D. Continuous AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Binomial 52. A discrete variable that can often be used to describe the number of occurrences of an event over a specified interval of time or space is a _____ random variable. A. Poisson B. Discrete C. Hypergeometric D. Continuous AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Poisson 53. The requirement that the probability of success remains constant from trial to trial is a property of the _______________ distribution. A. Binomial B. Poisson C. Hypergeometric D. Continuous AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Binomial 1-399 Chapter 01 - An Introduction to Business Statistics 54. The distribution whose mean is equal to its variance is the _________ distribution. A. Binomial B. Poisson C. Hypergeometric D. Continuous AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Topic: Poisson 55. For a random variable X, the mean value of the squared deviations of its values from their expected value is called its A. Standard Deviation B. Mean C. Probability D. Variance AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Hard Topic: Discrete Random Variable 56. The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. If 3 calculators are selected at random, what is the probability that one of the calculators will be defective? A. .0702 B. .0010 C. .2430 D. .7290 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Binomial 1-400 Chapter 01 - An Introduction to Business Statistics 57. The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. If 10 calculators are selected at random, what is the probability that 3 or more of the calculators will be defective? A. .0702 B. .2639 C. .0016 D. 0 P(X ≥ 3) = 1 - P(X ≤ 2) = 1 - .9298 = .0702 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Binomial 58. The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. If 100 calculators are selected at random, what is the expected number of defectives? A. 9 B. 90 C. 10 D. 95 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Binomial 1-401 Chapter 01 - An Introduction to Business Statistics 59. The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. If 100 calculators are selected at random, what is the standard deviation of the number of defectives? A. 9.00 B. 3.17 C. 9.49 D. 3.00 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Binomial 60. Historical data shows that the average number of patient arrivals at the intensive care unit of General Hospital is 3 patients every 2 hours. Assume that the patient arrivals are distributed according to Poisson distribution. Determine the probability of 6 patients arriving in a five-hour period. A. .136 B. .109 C. .246 D. .001 AACSB: Analytical Studies Bloom's: Application...
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