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A Shell oil company executive says that a majority of workers (more than 50%) prefer a 10 hour four day work week over an 8 hour five day work week. Of a 105 worker sample, 67 said they prefer a 10-hour-4-day work-week. At alpha- significance level of .01 does this sample support the executive's suggestion (right-tail)
a. Critical Value:
b. What is the appropriate calculated test statistic T or Z:
c. Statistical conclusion:
d. Practical conclusion:
An independent testing services road-tested 36 of the automobiles.
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What is a test of a proportion and give an example. What test do you use when one sample is small and the other large?
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