elmendorf {wPerm}

Elmendorf Tear-Strength Data

Description

Elmendorf tear strengths, in grams, for independent samples of Brand A and Brand B vinyl floor coverings.

Usage

data("elmendorf")

Format

A data frame with 20 observations on the following 2 variables.

BRAND

a factor with levels BRAND.A BRAND.B

STRENGTH

a numeric vector

Details

Variation within a method used for testing a product is an essential factor in deciding whether the method should be employed. Indeed, when the variation of such a test is high, ascertaining the true quality of a product is difficult. The Elmendorf tear test is used to evaluate material strength for various manufactured products. In the article cited below, researchers investigated the variation of that test. For one aspect of the study, they randomly and independently obtained the data in "elmendorf" on Elmendorf tear strength, in grams, of two different brands of vinyl floor coverings.

Source

Phillips, A., Jeffries, R., Schneider, J., and Frankoski, S. (1997) Using Repeatability and Reproducibility Studies to Evaluate a Destructive Test Method. Quality Engineering, 10, pp. 283-290.

Examples

data(elmendorf)
str(elmendorf)
plot(elmendorf)
attach(elmendorf)
detach(elmendorf)