# Calcium Supplements

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

https://brainmass.com/statistics/hypothesis-testing/calcium-supplements-effects-blood-pressure-6408

#### Solution Preview

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=Âµ1 - Âµ2, for this question, the null and alternative hypotheses are:

Ho: Âµ1 - Âµ2 = 0, or Md=0

H1: Âµ1 - Âµ2 <> 0 or Md<>0

Applying the general formula,

where Md is the difference between sample means, Âµ1 - Âµ2 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