Description

An experiment was conducted to select the supplier of raw materials for production of a component. The breaking strength of the component was the objective of interest. Four suppliers were considered. The four operators can only produce one component each per day. A Latin square design was used.

Usage

Format

A data frame with 16 observations on the following 4 variables.

y

The breaking strength of the component

operator

the operator - a factor with levels op1 op2 op3 op4

day

the day of production - a factor with levels day1 day2 day3 day4

supplier

the supplier of the raw material - a factor with levels A B C D

Source

Lentner M. and Bishop T. (1986) Experimental Design and Analysis, Valley Book Company