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Math Help - Estimate mean with % confidence.

  1. #1
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    Estimate mean with % confidence.

    I have a homework question that I cant figure out. I am looking for the formula on how to solve.

    HW question: How many students would need to be in the sample if you wanted to estimate the mean height of OCC statistics students within .05 inch with 95% confidence?

    I have the sample mean and the sample standard deviation as well as N.

    Thank you for any help you can give.
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  2. #2
    Junior Member
    Joined
    Nov 2009
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    Quote Originally Posted by weps10 View Post
    I have a homework question that I cant figure out. I am looking for the formula on how to solve.

    HW question: How many students would need to be in the sample if you wanted to estimate the mean height of OCC statistics students within .05 inch with 95% confidence?

    I have the sample mean and the sample standard deviation as well as N.

    Thank you for any help you can give.
    x +/- 1.96 α/√n
    x= sample mean
    α standard deviation
    n
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