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Statistics for Business and Economics | 12th Edition | ISBN: 9780321826237 | Authors: James T. McClave, P. George Benson, Terry T Sincich
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Nannies who work for celebrities. The International Nanny

Chapter 6, Problem 50E

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QUESTION:

Problem 50E

Nannies who work for celebrities. The International Nanny Association reports that in a sample of 528 in-home child care providers (nannies), 20 work for either a nationally known, locally known, or internationally known celebrity (2011 International Nanny Association Salary and Benefits Survey). Use Wilson’s adjustment to find a 95% confidence interval for the true proportion of all nannies who work for a celebrity. Interpret the resulting interval.

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QUESTION:

Problem 50E

Nannies who work for celebrities. The International Nanny Association reports that in a sample of 528 in-home child care providers (nannies), 20 work for either a nationally known, locally known, or internationally known celebrity (2011 International Nanny Association Salary and Benefits Survey). Use Wilson’s adjustment to find a 95% confidence interval for the true proportion of all nannies who work for a celebrity. Interpret the resulting interval.

ANSWER:

Solution 50E

Step1 of 2:

From the given problem we have:

n = 528,

x = 20.

We need to find a 95% confidence interval for the true proportion of all nannies who work for a celebrity.

Step2 of 2:

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