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    Empirical Rule for Normal Distribution

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    Consider that measurement 2 (M2) in a random sample of 1000 controls from the Disease Y study population follows the normal distribution. The sample mean of M2 is 90 and 95% of the sample observation falls within 70 and 110. Calculate the sample standard deviation and standard error of the sample mean and intepret.

    I would really appreciate some ideas of how to go about calculate sd and se from such a statement.

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    Solution Preview

    Hi there,

    For this question, I believe that you need to use the empirical rule to determine the standard deviation. The empirical states the following for a normal distribution:

    - 68% of the area of the curve will be ...

    Solution Summary

    This solution helps with a normal distribution problem.