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2 weeks ago
Commuting to work The table shows how a company’s employees commute to work.

a. What is the marginal distribution (in %) of mode of transportation?
    Car _____ Bus _____ Train _____
b. What is the conditional distribution (in %) of mode of transportation for management?
    Car _____ Bus _____ Train _____
c. What kind of display would you use to show the association between job class and mode of transportation? (Just name a graph.)
d. Do job classification and mode of transportation appear to be independent? Give statistical evidence to support your conclusion.
Textbook 

Stats: Modeling the World


Edition: 4th
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wrote...
Posts: 260
2 weeks ago
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a. Car: 19.5%

Bus: 30%Train: 50.5%

b. Car: 28.9% Bus: 22.2% Train: 48.9%

c. segmented bar graph, or pie charts

d. No, there is a difference between the percents in two types of transportation - Car and Bus categories, depending on the Job Classification.

  Car         Bus     Train

   Management     28.9%   22.2%     48.9%

   Labor  17.0%      32.1%    50.9%

Although about half of each group take the train, management are more likely than labor to come by car and less likely to take a bus.
1

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