separate: Electrical resistance of battery separators

In EngrExpt: Data sets from "Introductory Statistics for Engineering Experimentation"

Description

Electrical resistance of battery separators

Format

A data frame with 24 observations on the following 4 variables.

silica

a factor with levels High Low

time

a factor with levels High Low

temp

a factor with levels High Low

y

a numeric vector

Details

This experiment was run to study the effect of three process factors on the electrical resistance of a battery separator (extruded from a rubber, oil, and silica mix). Each of the three factors, occur at two levels, designated "High" and "Low".

References

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

Examples

str(separate)

Example output

Loading required package: lattice
'data.frame':	24 obs. of  4 variables:
 $ silica: Ord.factor w/ 2 levels "Low"<"High": 1 1 1 1 1 1 1 1 1 1 ...
 $ time  : Ord.factor w/ 2 levels "Low"<"High": 1 1 1 1 1 1 2 2 2 2 ...
 $ temp  : Ord.factor w/ 2 levels "Low"<"High": 1 1 1 2 2 2 1 1 1 2 ...
 $ y     : num  40.9 42.2 41.3 46.3 47 48.2 48.6 49.5 46.6 69 ...

EngrExpt documentation built on May 2, 2019, 5:53 p.m.