steel.bar: Steel bar

Description Usage Format Source References

Description

An experiment that investigated the cause of variability of the length of steel bars in a manufacturing process. (Chapter 7, Table 7.26)

Usage

1

Format

A data frame with 96 rows and 4 variables:

A

heat treatment - 2 levels

B

screw machine - 4 levels

C

time of day - 3 levels (8 am, 11 am, 3 pm)

Y

(length - 4.38) x 100 inches

Source

http://www.wright.edu/~dan.voss/bookdata/data.html

References

Dean, A. and Voss, D. (1999). Design and Analysis of Experiments. New York, Springer.


clayford/dvdata documentation built on May 13, 2019, 7:38 p.m.