viscosity: Viscosity for aircraft primer paint data

In luca-scr/qcc: Quality Control Charts

Viscosity for aircraft primer paint data

Description

"The viscosity of an aircraft primer paint is an important quality characteristic. The product is produced in batches, and because each batch takes several hours to produce, the production rate is too slow to allow for rational subgroups of size greater than one." (Montgomery, 2005, p. 232)

Usage

data(viscosity)

Format

A data frame with 35 observations on the following 3 variables.

batch

batch number

viscosity

viscosity measure

trial

preliminary sample indicator (TRUE/FALSE)

References

Montgomery, D.C. (2005) Introduction to Statistical Quality Control, 5th ed, New York, John Wiley & Sons, pp. 232-235

Examples

data(viscosity)
describe(viscosity, by = trial)
plot(viscosity ~ batch, data = viscosity, type = "o", 
     pch = ifelse(trial, 19, 1))

luca-scr/qcc documentation built on Feb. 25, 2023, 3:33 p.m.