analytical {hassediagrams} | R Documentation |
A cross-nested design for an analytical method investigation
Description
The reliability of an analytical method was assessed in an experiment consisting of three batches of material, analysed by four analysts, two at each site. Within each site, there were two chromatographic systems and two columns. For each batch/analyst/system/column combination, two preparations (dissolved samples) were made. From each preparation, two injections were performed.
Usage
data(analytical)
Format
A data frame of 192 observations on 8 variables/factors:
- Site
Categoric factor with levels 1 and 2.
- Analyst
Categoric factor with levels 1-4.
- Run
Categoric factor with levels 1-16.
- Prep
Categoric factor with levels 1-96.
- Injection
Categoric factor with levels 1-192.
- System
Categoric factor with levels 1-4.
- Column
Categoric factor with levels 1-4.
- Batch
Categoric factor with levels 1-3.
Source
Bate, S.T. and Chatfield, M.J. (2016). "Identifying the Structure of the Experimental Design". *Journal of Quality Technology* 48, pp. 343-364.
Examples
data("analytical")
analytical