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Unformatted text preview: Chapter 01 - An Introduction to Business Statistics 3. The mean and median are the same for an exponential distribution. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Topic: Exponential Distribution 4. In a statistical study, the random variable X = 1, if the house is colonial, and X = 0 if the house is not colonial, then it can be stated that the random variable is continuous. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Topic: Continuous Random Variable 5. The actual weight of hamburger patties is an example of a continuous random variable. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Continuous Random Variable 1-473 Chapter 01 - An Introduction to Business Statistics 6. The number of defective pencils in a lot of 1000 is an example of a continuous random variable. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Continuous Random Variable 7. For a continuous distribution, P(X ≤ 100) = P(X < 100). TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Continuous Probability Distribution 8. All continuous random variables are normally distributed. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Continuous Probability Distribution 9. For a continuous distribution, the exact probability of a particular value is zero. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Continuous Probability Distribution 1-474 Chapter 01 - An Introduction to Business Statistics 10. The height of a probability curve f(x) at a particular point indicates the value of a probability for a given value of a random variable x. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Topic: Continuous Probability Distribution 11. A continuous probability distribution having a rectangular shape where the probability is evenly distributed over an interval of numbers is called a uniform probability distribution. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Uniform Distribution 12. The exponential probability distribution is based on a continuous random variable. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Topic: Exponential Distribution 13. The mean of a standard normal distribution is always equal to 1. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Topic: Normal Distribution 1-475 Chapter 01 - An Introduction to Business Statistics 14. The standard deviation of a standard normal distribution is always equal to 1. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Topic: Normal Distribution 15. The normal probability distribution is a discrete probability distribution. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Topic: Normal Distribution 16. A continuous random variable may assume only integer values in a given interval. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Topic: Continuous Random Variable 17. The z value tells us the number of standard deviations that a value x is from the mean. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Topic: Normal Distribution 1-476 Chapter 01 - An Introduction to Business Statistics 18. If the random variable of x is normally distributed, 68.26% of all possible observed values of x will be within two standard deviations of the mean. FALSE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Topic: Normal Distribution 19. For a binomial probability experiment, with n = 150 and p = .2, it is appropriate to use the normal approximation to the binomial distribution. TRUE AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Binomial - Normal Approximation Multiple Choice Questions 20. The mean life of pair of shoes is 40 months with a standard deviation of 8 months. If the life of the shoes is normally distributed, how many pairs of shoes out of one million will need replacement before 36 months? A. 500,000 B. 808,500 C. 191,500 D. 308,500 AACSB: Analytical Studies Bloom's: Application Difficulty: Hard Topic: Normal Distribution 1-477 Chapter 01 - An Introduction to Business Statistics 21. A standard normal distribution has a mean of _____ and standard deviation of _____. A. zero, zero B. zero, one C. one, one D. one, zero AACSB: Analytical Studies Bloom's: Knowledge Difficulty: Easy Topic: Normal Distribution 22. A property of continuous distributions is that: A. As with discrete random variables, the probability distribution can be approximated by a smooth curve. B. Probabilities for continuous variables can be approximated using discrete random variables. C. Unlike discrete random variables, probabilities can be found using tables. D. Unlike discrete random variables, the probability that a continuous random variable equals a specific value is zero [P(X = x) = 0]. AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Hard Topic: Continuous Probability Distributi...
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## This document was uploaded on 01/20/2014.

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