Humidity of 20 groups of size 5 of raw materials to make particle boards. For the mean and range control chart.
data(ss.data.pb2)
A data frame with 100 observations on the following 2 variables.
pb.group
a numeric vector
pb.humidity
a numeric vector
See references.
This data set is used in chapter 12 of the book ``Six Sigma with R'' (see References).
Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andrés. 2012.
Six Sigma with R. Statistical Engineering for Process
Improvement, Use R!, vol. 36. Springer, New York.
https://link.springer.com/book/10.1007/978-1-4614-3652-2/.