310 15 solution

310 15 solution - Solutions to BUAD 310 In-Class Practice...

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- 1 - Solutions to BUAD 310 In-Class Practice for Final 4/22/09 True/False 1. An example of a quantitative variable is the make of a car. Answer: False Difficulty: Easy 2. An example of a qualitative variable is the mileage of a car. Answer: False Difficulty: Easy 3. The population mean is the average of the population measurements. Answer: True Difficulty: Medium 4. The population mean is the point estimate of the sample mean. Answer: False Difficulty: Medium 5. The median is said to be resistant to extreme observations. Answer: True Difficulty: Medium 6. The range of the measurement is the largest measurement plus the smallest measurement. Answer: False Difficulty: Medium 7. A discrete random variable may assume a countable number of outcome values. Answer: True Difficulty: Easy 8. The mean and median are the same for a normal distribution. Answer: True Difficulty: Easy 9. The number of defective pencils in a lot of 1000 is an example of a continuous random variable. Answer: False Difficulty: Medium 10. For a continuous distribution, P( X 100) = P( X < 100). Answer: True Difficulty: Medium 11. The z -score tells us the number of standard deviations that a value x is from the mean. Answer: True Difficulty: Easy 12. The standard deviation of a standard normal distribution is always equal to 1. Answer: True Difficulty: Easy 13. If the random variable X is normally distributed, 68.26% of all possible observed values of X will be within two standard deviations of the mean. Answer: False Difficulty: Easy
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- 2 - 14. For any sampled population, the population of all sample means is approximately normally distributed for large sample size. Answer: True Difficulty: Medium 15. A sample statistic is an unbiased point estimate of a population parameter if the mean of the population of all possible values of the sample statistic equals the population parameter.
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This note was uploaded on 01/16/2010 for the course BUAD 310 at USC.

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310 15 solution - Solutions to BUAD 310 In-Class Practice...

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