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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 zscore of 1.2, and
24 mpg has a zscore 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 1502 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 1503 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 1504 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 1505 Chapter 01  An Introduction to Business Statistics 90. The population of lengths of aluminumcoated 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 aluminumcoated 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 1506 Chapter 01  An Introduction to Business Statistics 92. The population of lengths of aluminumcoated 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 aluminumcoated 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 1507 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 1508 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
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 Winter '14

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