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CHAPTER 6

# CHAPTER 6 - C HAPTER 6 T H E NOR MAL D ISTR I BU T IO N AND...

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CHAPTER 6: THE NORMAL DISTRIBUTION AND OTHER CONTINUOUS DISTRIBUTIONS 1. In its standardized form, the normal distribution a) has a mean of 0 and a standard deviation of 1. b) has a mean of 1 and a variance of 0. c) has an area equal to 0.5. d) cannot be used to approximate discrete probability distributions. ANSWER: a TYPE: MC DIFFICULTY: Easy KEYWORDS: standardized normal distribution, properties 2. Which of the following about the normal distribution is NOT true? 3. If a particular batch of data is approximately normally distributed, we would find that approximately 4. For some positive value of Z , the probability that a standardized normal variable is between 0 and Z is 0.3770. The value of Z is

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5. For some value of Z , the probability that a standardized normal variable is below Z is 0.2090. The value of Z is a) – 0.81. b) – 0.31. c) 0.31. d) 1.96. ANSWER: a TYPE: MC DIFFICULTY: Moderate KEYWORDS: standardized normal distribution, value 6. For some positive value of Z , the probability that a standardized normal variable is between 0 and Z is 0.3340. The value of Z is 7. For some positive value of X , the probability that a standardized normal variable is between 0 and + 2 X is 0.1255. The value of X is 8. For some positive value of X , the probability that a standardized normal variable is between 0 and +1.5 X is 0.4332. The value of X is

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CHAPTER 6 - C HAPTER 6 T H E NOR MAL D ISTR I BU T IO N AND...

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