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An apple juice producer buys all his apples from a

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Unformatted text preview: ss Statistics 144. A paint sprayer coats a metal surface with a layer of paint between 0.43 and 1.23 millimeters thick. The thickness of the coat of paint is approximately uniformly distributed. What is the probability that paint from this sprayer on any given metal surface will be between 0.75 and 1.05 millimeters thick? A. .375 B. .181 C. .854 D. .610 AACSB: Analytical Studies Bloom's: Application Difficulty: Easy Topic: Uniform Distribution 145. The yearly cost of dental claims for the employees of the local shoe manufacturing company is normally distributed with a mean of $105 and a standard deviation of $35. What is the yearly cost at which 35% of the employees fall at or below? A. $118.48 B. $127.29 C. $82.71 D. $91.53 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 1-532 Chapter 01 - An Introduction to Business Statistics 146. A plant manager knows that the number of boxes of supplies received weekly is normally distributed with a mean of 200 and a standard deviation of 20. What percentage of the time will the number of boxes received weekly be greater than 200 A. 100% B. 25% C. 0% D. 50% AACSB: Analytical Studies Bloom's: Application Difficulty: Easy Topic: Normal Distribution 147. A plant manager knows that the number of boxes of supplies received weekly is normally distributed with a mean of 200 and a standard deviation of 20. What percentage of the time will the number of boxes received weekly be less than 160? A. 2.28% B. 57.93% C. 42.07% D. 4.56% AACSB: Analytical Studies Bloom's: Application Difficulty: Easy Topic: Normal Distribution 1-533 Chapter 01 - An Introduction to Business Statistics 148. A plant manager knows that the number of boxes of supplies received weekly is normally distributed with a mean of 200 and a standard deviation of 20. What percentage of the time will the number of boxes received weekly be between 180 and 210? A. .6915 B. .1915 C. .5328 D. .1587 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 149. A plant manager knows that the number of boxes of supplies received weekly is normally distributed with a mean of 200 and a standard deviation of 20. What percentage of the time will the number of boxes received weekly be greater than 210 or Less than 180? A. .6915 B. .4672 C. .1915 D. .1587 AACSB: Analytical Studies Bloom's: Application Difficulty: Hard Topic: Normal Distribution 1-534 Chapter 01 - An Introduction to Business Statistics 150. Suppose the distribution of personal daily water usage in New York City is normally distributed with a mean of 15 gallons and a variance of 25 gallons. Because of a current problem with the distribution of water to its citizens, the mayor wants to give a city tax rebate to the 15 percent of the population who use the least amount of water. What should he use as the water limit for a person to qualify for a city tax rebate? A. 9.825 B. 15.00 C. 12.20 D. 10.25 AACSB: Analytical Studies Bloom's: Application Difficulty: Hard Topic: Normal Distribution Chapter 07 Sampling and Sampling Distributions True / False Questions 1. If we have a sample size of 100 and the estimate of the population proportion is .10, we can estimate the sampling distribution of with a normal distribution. True False 2. A sample size of 500 is sufficiently large enough to conclude that the sampling distribution of is a normal distribution, when the estimate of the population proportion is .995. True False 3. The sampling distribution of deviation 1. True False must be a normal distribution with a mean 0 and standard 1-535 Chapter 01 - An Introduction to Business Statistics 4. For any sampled population, the population of all sample means is approximately normally distributed. True False 5. The sampling distribution of a sample statistic is the probability distribution of the population of all possible values of the sample statistic. True False 6. A sample statistic is an unbiased point estimate of a population parameter if the mean of the populations of all possible values of the sample statistic equals the population parameter. True False 1-536 Chapter 01 - An Introduction to Business Statistics 7. A minimum variance, unbiased point estimate has a variance that is as small or smaller than the variances of any other unbiased point estimate. True False 8. We can randomly select a sample from an infinite population of potential process measurements by sampling the process at different and equally spaced time points. True False 9. The reason sample variance has a divisor of n-1 rather than n is that it makes the variance an unbiased estimate of the population variance. True False 10. The standard deviation of all possible sample proportions increases as the sample size increases. True False 11. The central limit theorem states that as sample size increases, the population distribution more closely approximates a normal distribution. True False 12. If a population is known to be normally distributed, then it follows that the sample standard deviation must equal σ. True False 13. If the sampled population is exactly normal distribution,...
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This document was uploaded on 01/20/2014.

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