Stability of a chemical product
Stability of a chemical product
A data frame with 12 observations on the following 4 variables.
tempa numeric factor at two levels
humiditya numeric factor at two levels
timea numeric factor at three levels
ya numeric vector
The stability of the active ingredient is critical. This study looks at the impact of temperature and humidity on the stability of the active ingredient over time.
Peter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)
str(stab)
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