=+How large a sample would she need to take to have a 99% interval half as wide?

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=+How large a sample would she need to take to have a 99% interval half as wide? One quarter as wide?

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Business Statistics Plus Pearson Mylab Statistics With Pearson Etext

ISBN: 978-1292243726

3rd Edition

Authors: Norean R Sharpe ,Richard D De Veaux ,Paul Velleman

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