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Unformatted text preview: 1.00 106. At an ocean-side nuclear power plant, seawater is used as part of the cooling system. This raises the temperature of the water that is discharged back into the ocean. The amount that the water temperature is raised has a uniform distribution over the interval from 10 to 25ºC. What is the probability that the temperature increase will be between 20 and 22ºC? A. 0.08 B. 0.88 C. 0.13 D. 0.20 1-459 Chapter 01 - An Introduction to Business Statistics 107. At an ocean-side nuclear power plant, seawater is used as part of the cooling system. This raises the temperature of the water that is discharged back into the ocean. The amount that the water temperature is raised has a uniform distribution over the interval from 10 to 25ºC. Suppose that a temperature increase of more than 18ºC is considered to be potentially dangerous to the environment. What is the probability that at any point of time, the temperature increase is potentially dangerous? A. 0.47 B. 0.72 C. 0.28 D. 0.50 108. At an ocean-side nuclear power plant, seawater is used as part of the cooling system. This raises the temperature of the water that is discharged back into the ocean. The amount that the water temperature is raised has a uniform distribution over the interval from 10 to 25ºC. What is the expected value of the temperature increase? A. 7.50 B. 4.33 C. 17.50 D. 10.12 109. At an ocean-side nuclear power plant, seawater is used as part of the cooling system. This raises the temperature of the water that is discharged back into the ocean. The amount that the water temperature is raised has a uniform distribution over the interval from 10 to 25ºC. What is the standard deviation of the temperature increase? A. 10.12 B. 4.33 C. 7.50 D. 1.25 1-460 Chapter 01 - An Introduction to Business Statistics 110. During the past six months, 73.2% of US households purchased sugar. Assume that these expenditures are approximately normally distributed with a mean of $8.22 and a standard deviation of $1.10. Find the probability that a household spent less than $5.00 A. .9983 B. 0.000 C. 1.00 D. 0.0017 111. During the past six months, 73.2% of US households purchased sugar. Assume that these expenditures are approximately normally distributed with a mean of $8.22 and a standard deviation of $1.10. Find the probability that a household spent more than $10.00 A. .7320 B. .9474 C. .0526 D. .2680 112. During the past six months, 73.2% of US households purchased sugar. Assume that these expenditures are approximately normally distributed with a mean of $8.22 and a standard deviation of $1.10. Find the probability that a household spent more than $16.00 A. 1.00 B. 0.00 C. 0.50 D. 0.98 113. During the past six months, 73.2% of US households purchased sugar. Assume that these expenditures are approximately normally distributed with a mean of $8.22 and a standard deviation of $1.10. What proportion of the households spent between $5.00 and $9.00? A. .7611 B. .7628 C. .0017 D. .7594 1-461 Chapter 01 - An Introduction to Business Statistics 114. During the past six months, 73.2% of US households purchased sugar. Assume that these expenditures are approximately normally distributed with a mean of $8.22 and a standard deviation of $1.10. 99% of the households spent less than what amount? A. $5.66 B. $10.78 C. $6.81 D. $9.63 115. During the past six months, 73.2% of US households purchased sugar. Assume that these expenditures are approximately normally distributed with a mean of $8.22 and a standard deviation of $1.10. 80% of the households spent more than what amount? A. $7.30 B. $7.38 C. $9.06 D. $9.14 116. Suppose that the times required for a cable company to fix cable problems in its customers' homes are uniformly distributed between 40 minutes and 65 minutes. What is the probability that a randomly selected cable repair visit will take at least 50 minutes? A. .77 B. .40 C. .60 D. .23 117. Suppose that the times required for a cable company to fix cable problems in its customers' homes are uniformly distributed between 40 minutes and 65 minutes. What is the probability that a randomly selected cable repair visit falls within 2 standard deviations of the mean? A. 0.75 B. 1.00 C. 0.58 D. 0.86 1-462 Chapter 01 - An Introduction to Business Statistics 118. Suppose that the waiting time for a license plate renewal at a local office of a state motor vehicle department has been found to be normally distributed with a mean of 30 minutes and a standard deviation of 8 minutes. What is the probability that a randomly selected individual will have a waiting time between 15 and 45 minutes? A. 1.00 B. .9699 C. .5000 D. .9398 119. Suppose that the waiting time for a license plate renewal at a local office of a state motor vehicle department has been found to be normally distributed with a mean of 30 minutes and a standard deviation of 8 minutes. What is the probability that a randomly selected individual will have a waiting time at least 10 minutes? A. .9938 B. .8944 C. .1056 D. .0062...
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