The serum calcium levels in 11 test subjects before taking a multi-vitamin containing calcium and three hours after taking the vitamin.
A data frame with 11 observations on the following 2 variables.
serum calcium level (mg/dl) at time zero
serum calcium level (mg/dl) three hours after taking the multi-vitamin containing calcium
This was a small pilot study to test the effectiveness of the multi-vitamin with respect to calcium absorption.
Peter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)
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