EngrExpt (version 0.1-6)

calcium: Calcium levels before and after taking vitamin

Description

The serum calcium levels in 11 test subjects before taking a multi-vitamin containing calcium and three hours after taking the vitamin.

References

Peter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)

Examples

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)