GB 513 Course Great Wisdom / tutorialrank.com GB 513 Course Great Wisdom / tutorialrank.com | Page 6

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?
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GB 513 Unit 3 Assignment
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Question 1
A group of investors wants to develop a chain of fast-food
restaurants. In determining potential costs for each facility,
they must consider, among other expenses, the average
monthly electric bill. They decide to sample some fast-food
restaurants currently operating to estimate the monthly cost
of electricity. They want to be 90% confident of their results
and want the error of the interval estimate to be no more
than $100. They estimate that such bills range from $600 to
$2,500. How large a sample should they take?
Question 2
Suppose a study reports that the average price for a gallon of
self-serve regular unleaded gasoline is $3.16. You believe
that thefigure is higher in your area of the country. You
decide to test this claim for your part of the United States by