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Teen smokers.
In studying the behavior of teen smokers, the organization Monitoring the Future (www.monitoringthefuture.org) asked 2048 eighth graders who said they smoked cigarettes what brands they preferred. The results are shown in the table. Write a few sentences describing this distribution.
Brand preference
Percent
Marlboro
53.7
Newport
22.5
Camel
5.4
Other (over 20 brands)
8.7
No usual brand
9.7
A bank manager recorded the number of hours taken to accomplish a particular task. He got the data below. Hours:10, 11, 12, 13, 14, 15, 16, 17, 18. Number of Employees: 2, 4, 6, 8, 10, 12, 14, 16, 18. Find the coefficient of correlation(r).
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