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(79,000 < 90,000)
= .2(30,000) + .5(50,000) + .3(200,000) = 79,000 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Discrete Probability Distribution 104. According to data from the state blood program, 40% of all individuals have group A
blood. If six (6) individuals give blood, find the probability
None of the individuals has group A blood?
A. .0041
B. .0410
C. .4000
D. .0467 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Easy
Topic: Binomial 1424 Chapter 01  An Introduction to Business Statistics 105. According to data from the state blood program, 40% of all individuals have group A
blood. If six (6) individuals give blood, find the probability
Exactly three of the individuals has group A blood?
A. .4000
B. .2765
C. .5875
D. .0041 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Easy
Topic: Binomial 106. According to data from the state blood program, 40% of all individuals have group A
blood. If six (6) individuals give blood, find the probability
At least 3 of the individuals have group A blood.
A. .8208
B. .5443
C. .4557
D. .1792
P(x ≥ 3) = P(x = 3) + p(x = 4) + p(x = 5) + p(x = 6) = .4557 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Binomial 1425 Chapter 01  An Introduction to Business Statistics 107. According to data from the state blood program, 40% of all individuals have group A
blood. If six (6) individuals give blood, find the probability
Find the mean number of individuals having group A blood.
A. 1.2
B. 1.55
C. 1.44
D. 2.4 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Easy
Topic: Binomial 108. According to data from the state blood program, 40% of all individuals have group A
blood. If six (6) individuals give blood, find the probability
Suppose that of the six randomly selected individuals, 3 have group A blood. Would you
believe the data from the state blood program?
A. Yes, probability is > .05
B. Yes, probability is < .05
C. No AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Binomial 1426 Chapter 01  An Introduction to Business Statistics 109. A lawyer believes that the probability is .3 that she can win a discrimination suit. If she
wins the case she will make $40,000, but if she loses she gets nothing. Assume that she has to
spend $5000 preparing the case. What is her expected gain?
A. $35,000
B. $7,000
C. $10,500
D. $9,000
= (.7) (5000) + (.3) (35000) = 7000 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Hard
Topic: Discrete Probability Distribution 110. Your company's internal auditor believes that 10% of the company's invoices contain
errors. To check this theory, 20 invoices are randomly selected and 5 are found to have errors.
What is the probability that of the 20 invoices written, five or more would contain errors if the
theory is valid?
A. .0433
B. .0319
C. .9567
D. .8660
P(x ≥ 5) = (.0319) + (.0089) + (.0020) + (.0004) + (0001) = .0433 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Easy
Topic: Binomial 1427 Chapter 01  An Introduction to Business Statistics 111. Your company's internal auditor believes that 10% of the company's invoices contain
errors. To check this theory, 20 invoices are randomly selected and 5 are found to have errors.
Would you accept or reject the claim?
A. Accept the auditor's claim
B. Reject the auditor's claim
Reject claim because P < .05 AACSB: Analytical Studies
Bloom's: Analysis
Difficulty: Medium
Topic: Binomial 112. An important part of the customer service responsibilities of a cable company relates to
the speed with which trouble in service can be repaired. Historically, the data show that the
likelihood is 0.75 that troubles in a residential service can be repaired on the same day. For
the first five troubles reported on a given day, what is the probability that: All five will be
repaired on the same day?
A. .0010
B. .6328
C. .9990
D. .2373
P(x = 5) = .2373 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Easy
Topic: Binomial 1428 Chapter 01  An Introduction to Business Statistics 113. An important part of the customer service responsibilities of a cable company relates to
the speed with which trouble in service can be repaired. Historically, the data show that the
likelihood is 0.75 that troubles in a residential service can be repaired on the same day. For
the first five troubles reported on a given day, what is the probability that: Fewer than two
troubles will be repaired on the same day?
A. .6328
B. .0010
C. .0156
D. .0146
P(x < 2) = P(x = 0) + P(x = 1) = .0156 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Binomial 114. An important part of the customer service responsibilities of a cable company relates to
the speed with which trouble in service can be repaired. Historically, the data show that the
likelihood is 0.75 that troubles in a residential service can be repaired on the same day. For
the first five troubles reported on a given day, what is the probability that: At least 3 troubles
will be repaired...
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 Winter '14
 Frequency, Frequency distribution, Histogram, AACSB, Statistical charts and diagrams

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