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    Statistics: Determination of Sample Size

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    A confidence interval was used to estimate the proportion of statistics students that are female. A random sample of 72 statistics students generated the following 90% confidence level ( 0.438, 0.642). Using this information what size sample would be necessary if we wanted to estimate the true proportion to within plus/minus 0.08 using 95% confidence?

    A. 105
    B. 150
    C. 420
    D. 597.

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    Solution Summary

    This solution provides step-by-step calculations for determining sample size.