As the baby boom generation ages, the number of employees injured on the job will continue to

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As the baby boom generation ages, the number of employees injured on the job will continue to increase. A recent poll by the Gallup Organization sponsored by Philadelphia-based CIGNA Integrated Care found that about 40% of employees have missed work due to a musculoskeletal (back) injury of some kind (National Underwriter, Apr. 5,1999). Let x be the number of sampled workers who have missed work due to a back injury.

a. Explain why x is approximately a binomial random variable.

b. Use the Gallup poll data to estimate p for the binomial random variable of part a.

c. A random sample of 10 workers is to be drawn from a particular manufacturing plant. Use the p from part b to find the mean and standard deviation of x, the number of workers that missed work due to back injuries.

d. For the sample in part

c, find the probability that exactly one worker missed work due to a back injury.

That more than one worker misscd work due to a back injury.

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Statistics For Business And Economics

ISBN: 9780130272935

8th Edition

Authors: James T. McClave, Terry Sincich, P. George Benson

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