ACSWR (version 1.0)

hardness: Hardness and a Block Experiment

Description

Four types of tip are used which form the blocks in this experiment. The variable of interest is the hardness which further depends on the type of metal coupon. For each type of the tip, the hardness is observed for 4 different types the metal coupon.

Usage

data(hardness)

Format

A data frame with 16 observations on the following 3 variables.

Tip_Type

Four types of tip which form the blocks

Test_Coupon

Four different types of metal coupons

Hardness

Hardness of the coupon

References

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

Examples

data(hardness)
hardness$Tip_Type <- as.factor(hardness$Tip_Type)
hardness$Test_Coupon <- as.factor(hardness$Test_Coupon)
hardness_aov <- aov(Hardness~Tip_Type+Test_Coupon,data=hardness)
summary(hardness_aov)