1-20chapter stats

6321 b 5507 c 7135 d 4493 aacsb analytical studies

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Unformatted text preview: ean = .20 and standard deviation = .30. What price change is associated with the 25th percentile? A. .1925 B. .2075 C. .401 D. -.001 AACSB: Analytical Studies Bloom's: Application Difficulty: Hard Topic: Normal Distribution 82. If the mileage per gallon for a car is normally distributed, 32 mpg has a z-score of 1.2, and 24 mpg has a z-score of -.4, what is the mean mpg of the distribution? A. 28 B. 26 C. 30 D. 38 AACSB: Analytical Studies Bloom's: Application Difficulty: Hard Topic: Normal Distribution 1-502 Chapter 01 - An Introduction to Business Statistics 83. Consider a normal population with a mean of 10 and a standard deviation 2. Find P(X > 13). A. .0668 B. .9544 C. .0456 D. .9332 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 84. Consider a normal population with a mean of 10 and a standard deviation 2. Find P(X < 12). A. .1587 B. .9544 C. .0456 D. .8413 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 85. Consider a normal population with a mean of 10 and a standard deviation 2. Find P(X = 10). A. 1.00 B. 0.99 C. 0.00 D. 0.01 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 1-503 Chapter 01 - An Introduction to Business Statistics 86. Consider a normal population with a mean of 10 and a variance of 4. Find P(X < 6). A. .0228 B. .1587 C. .8413 D. .9772 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 87. Consider a normal population with a mean of 10 and a variance of 4.Find P(X > 7). A. .0668 B. .9332 C. .8413 D. .1587 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 1-504 Chapter 01 - An Introduction to Business Statistics 88. Consider a normal population with a mean of 10 and a variance of 4.Find P(X > 18). A. 1.00 B. 0.00 C. .9772 D. .0228 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 89. Consider a normal population with a mean of 10 and a variance of 4.Find P(X ≥ 10). A. 1.00 B. 0.00 C. 0.50 D. -0.50 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 1-505 Chapter 01 - An Introduction to Business Statistics 90. The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches. What is the probability that a sheet selected at random will be less than 29.75 inches long? A. .8944 B. .1056 C. .9332 D. .0668 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 91. The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches. What is the probability that a sheet selected at random from the population is between 30.25 and 30.65 inches long? A. .9987 B. .1574 C. .1587 D. .8413 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 1-506 Chapter 01 - An Introduction to Business Statistics 92. The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches. What is the probability that a sheet selected at random will be less than 31 inches long? A. 0.00 B. 1.00 C. .8289 D. .5987 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 93. The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches. What is the probability that a sheet selected at random from the population is between 29.75 and 30.5 inches long? A. .4332 B. .4878 C. .0546 D. .9210 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 1-507 Chapter 01 - An Introduction to Business Statistics 94. If x is a binomial random variable where n = 100 and p = .1, find the probability that x is less than or equal to 10 using the normal approximation to the binomial. A. .5675 B. .0170 C. .5714 D. .4325 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Binomial - Normal Approximation 95. The weight of a product is normally distributed with a mean of four ounces and a variance of .25 "squared ounces." What is the probability that a randomly selected unit from a recently manufactured batch weighs more than 5 ounces? A. .0228 B. .9772 C. 0.000 D. 1.00 AACSB: Analytical Studies Bloom's: Application Difficulty: Medium Topic: Normal Distribution 1-508 Chapter 01 - An Introduction to Business Statistics 96. The weight of a product is normally distributed with a mean of four ounces and a variance of .25 "squared ounces." What is the probability that a randomly selected unit from a recently manufactured batch weighs no more than 3.5 ounces? A. .8413 B. .9772 C. .1587 D. .0228 AACSB: Analytical Studies Bloom's: Application Diffi...
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