| calcium {EngrExpt} | R Documentation |
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.
hrs0hrs3This 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)
str(calcium)
show(pl1 <-
xyplot(hrs3 ~ hrs0, calcium, type = c("g","p"), aspect = "iso",
xlab = "Calcium level (mg/dl) before taking multi-vitamin",
ylab =
"Calcium level (mg/dl) 3 hours after taking multi-vitamin"))
tmd(pl1)