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    Calcium Supplements

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    A. (Ey)(Ex2)-(Ex)(Exy) / n(Ex2) - (Ex2)

    B. n(Exy) - (Ex)(Ey) / square root of n(Ex2) - (Ex)2

    C. r= n(Exy) - (Ex)(Ey) / sq. root of
    [n(Ex2) - (Ex)2][n(Ey2) - (Ey)2

    © BrainMass Inc. brainmass.com March 4, 2021, 5:41 pm ad1c9bdddf
    https://brainmass.com/statistics/hypothesis-testing/calcium-supplements-effects-blood-pressure-6408

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    please refer to the attachment.

    I don't know how come you have those formulae, none is right.
    Because this is a test of difference between means:
    Using a .05 level of significance, test the hypothesis that there is no difference between the means of the two samples.
    Let Md=µ1 - µ2, for this question, the null and alternative hypotheses are:
    Ho: µ1 - µ2 = 0, or Md=0
    H1: µ1 - µ2 <> 0 or Md<>0
    Applying the general formula,

    where Md is the difference between sample means, µ1 - µ2 is the difference between ...

    Solution Summary

    The solution addresses which is the correct formula for the scenario - Sample data were collected in a study of calcium supplements and their effects on blood pressure. One of the following formulas is correct:

    A. (Ey)(Ex2)-(Ex)(Exy) / n(Ex2) - (Ex2)

    B. n(Exy) - (Ex)(Ey) / square root of n(Ex2) - (Ex)2

    C. r= n(Exy) - (Ex)(Ey) / sq. root of
    [n(Ex2) - (Ex)2][n(Ey2) - (Ey)2

    $2.49

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