A recent survey by the American Accounting Association revealed 52% of accountants have the Certified Public Accounting

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A recent survey by the American Accounting Association revealed 52% of accountants have the Certified Public Accounting (CPA) certificate. Suppose we select a sample of 15 accountants.

a. What is the random variable? How is the random variable distributed? Why?

b. What is the probability five of the 15 accountants are CPAs?

c. What is the probability seven or eight of the 15 accountants are CPAs?

d. What is the mean of the distribution of “number of CPA’s among 15 accountants”?

e. What is the variance of the distribution of “number of CPA’s among 15 accountants”?

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Statistical Techniques In Business And Economics

ISBN: 9781260239478

18th Edition

Authors: Douglas Lind, William Marchal, Samuel Wathen

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