12. For the confidence interval in Exercise 8: a) To reduce the margin of error to about...

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12. For the confidence interval in Exercise 8:

a) To reduce the margin of error to about $4, how large would the sample size have to be?

b) How large would the sample size have to be to reduce the margin of error to $0.80?

CHAPTER EXERCISES

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Business Statistics

ISBN: 9780321716095

2nd Edition

Authors: Norean D. Sharpe, Paul F. Velleman, David Bock, Norean Radke Sharpe

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