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A Travel Weekly International Air Transport Association survey asked business travelers about the purpose for their most recent business trip. 19% responded that it was for an internal company visit.
Suppose 950 business travelers are randomly selected.
a. What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit?
b. What is the probability that between 15% and 20% of the business travelers say that the reason for their most recent business trip was an internal company visit?
c. What is the probability that between 133 and 171 of the business travelers say that the reason for their most recent business trip was an internal company visit?
The use of linear regression is a critical tool for a manager's decision-making ability. Please carefully read the example below and try to answer the questions in terms of the problem context.
Find out the probability that: First electric brush chosen is defective?
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What proportion of the variability in steel shipments for motor vehicles is described by regression equation?
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Use the value 20 for the population standard deviation of scores on this subsection.
A IRS auditor randomly selects 3 tax returns from 48 returns of which 9 contain errors. What is the probability that she selects none of those containing errors? Round to four decimal places.
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