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Solved by verified expert:Please answer all question in detail. There are 10 questions, some are multiple choice and some quantitative. The questions are detailed for a quiz. This is for a management statistics class. Please show calculations for the quantitative questions.
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1.
2.
3.
Yahoo Travel’s “best beaches” online poll _nds that 67% of their several thousand respondents say that a
beach is the most likely place they would visit when taking a leisure trip. Does this mean that beaches are
the most popular destinations for leisure travelers?
Government statistics for on-the-job fatalities in 2005 show that there were 1,033 on-the-job deaths of
construction workers, as well as 1,388 transportation workers, 312 police and _re-_ghters, 282 factory
workers, and 630 management and executive-level workers. Does this mean management and executive
jobs may be safer than construction jobs, and more dangerous than _ghting _res or working in a factory?
Below are annual income histograms (in \$1,000s) for three di􀃖erent groups of people. In which histogram
is the average less than the median?
4.
Below are annual income histograms (in \$1,000s) for three di􀃖erent groups of people. In histogram (i), is
the median closest to 90, 100, or 120?
5.
Below are annual income histograms (in \$1,000s) for three di􀃖erent groups of people. In histogram (i), is
the SD smaller, larger, or about the same as that in histogram (iii)?
6.
Below are annual income histograms (in \$1,000s) for three di􀃖erent groups of people. In histogram (ii), is
the standard deviation (SD) closest to 15, 50, or 8.25?
7.
A record company would like to see if sending out posters of a popular artist can generate orders for the
artist’s records. They choose a large sample of potential customers and randomly send half of them a
poster of one of their popular artists along with a catalog, while they send only a catalog to the other half.
They observe that more orders come from the _rst group for the music of the artist on the poster than
the second group. They conclude that sending the poster is generating additional sales. Someone criticizes
the study saying “we can’t tell if additional sales were due to the poster.” Is this a valid criticism of the
study?
The weekly demand for a product follows a normal curve with an average of 1000 units and a standard
deviation of 200 units. In how many weeks during a typical 52-week year would be above 800 units?
8.
9.
Nationwide, GMAT scores in a particular year had an average of 492 with a standard deviation of 100 and
the scores roughly followed a normal curve. If a student scored 600 on the exam, approximately what
percentage of test-takers scored between the average and this student’s score?
10. The lifetime of a particular product made by a company is normally distributed with a mean of 3 years and
a standard deviation of 1.46 years. The company o􀃖ers a warranty of 6 months for the product. What
percentage of the product sold by the company will need warranty service, that is, lifetime will be less
than 6 months?