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You want to obtain a sample to estimate a population proportion. At this point in time,...

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 95% confident that you estimate is within 1.5% of the true population proportion. How large of a sample size is required?

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Answer #1

  • Margin of error = 0.015

  • z value for 95% Confidence is 1.96

  • Z=1.96

    Sample = n= 0.5×0.5×(1.96/0.015)2

    =4268.44

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