Why do we often need to take a preliminary sample when determining the size of the sample

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Why do we often need to take a preliminary sample when determining the size of the sample needed to make the margin of error of a confidence interval equal to E?

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Business Statistics In Practice

ISBN: 9780077534844

7th Edition

Authors: Bruce Bowerman, Richard OConnell, Emilly Murphree

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Question Posted: Aug 12, 2023 07:28 AM

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Why do we often need to take a preliminary sample when determining the size of the sample

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Business Statistics In Practice

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