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A Gallup poll wants to determine the mean number of books Americans read each year. How many subjects are needed to estimate the average
A Gallup poll wants to determine the mean number of books Americans read each year. How many subjects are needed to estimate the average number of books Americans read with a margin of error of 0.65 books with 80% confidence? Initial results of the Gallup poll indicate that the population standard deviation is 9.6 books.
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Elementary Linear Algebra with Applications
Authors: Howard Anton, Chris Rorres
9th edition
471669598, 978-0471669593
