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A study of more than 85,000 adults in the CDC journal Preventing Chronic Disease found that...

A study of more than 85,000 adults in the CDC journal Preventing Chronic Disease found that the number of American workers who practice yoga nearly doubled from 6% in 2002 to 11% in 2012 (Time, January 23, 2017, p.23). The trend bodes well for output, since activities such as yoga and meditation have been shown to increase productivity. Assume that this percent is 15% in 2018 and a sample of 30 workers is selected.


a. Compute the probability that exactly 3 workers practice yoga. Show your work.
b. calculate the probability that less than 5 workers practice yoga.
c. What is the expected number of workers who yoga in this sample?
d. What are the variance and the standard deviation?

Math   Statistics-And-Probability   
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