tensile {ACSWR}

The Tensile Strength Experiment

Description

An engineer wants to find out if the cotton weight percentage in a synthetic fiber effects the tensile strength. Towards this, the cotton weight percentage is fixed at 5 different levels of 15, 20, 25, 30, and 35. Each level of the percentage is assigned 5 experimental units and the tensile strength is measured on each of them. The randomization is specified in the Run_Number column. The goal of the engineer is to investigate if the tensile strength is same across the cotton weight percentage.

Usage

data(tensile)

Format

A data frame with 25 observations on the following 4 variables.

Test_Sequence

the test sequence

Run_Number

the run number

CWP

cotton weight percentage

Tensile_Strength

the tensile strength

References

Montgomery, D. C. (1976-2012). Design and Analysis of Experiments, 8e. J.Wiley.

Examples

data(tensile)
tensile$CWP <- as.factor(tensile$CWP)
tensile_aov <- aov(Tensile_Strength~CWP, data=tensile)
summary(tensile_aov)
model.matrix(tensile_aov)