EX14_1Montg_data: EX14_1Montg_data: Two-Stage Nested Design

In thoree/stat340: Data and functions for BIAS at NMBU

EX14_1Montg_data: Two-Stage Nested Design

Description

A company purchases its raw material from three different suppliers. The company wishes to determine whether the purity of the raw material is the same from each supplier. In this data there are four batches of raw material available from each supplier, and three determinations of purity are taken from each batch.

Usage

EX14_1Montg_data

Format

A tibble with 36 observations (rows) and 3 variables (columns).

	Column name	Data type	Description	Values
[,1]	Purity	numeric	Purity of the raw material	(-4 - 4)
[,2]	Supplier	factor	3 different suppliers	(Supplier1...Supplier3)
[,3]	Batch	factor	4 batches for each supplier	(Batch1...Batch4)

This is a two-stage nested design, with batches nested under suppliers. Batch is a factor with 4 levels nested under Supplier (i.e., there are 12 different batches).

Details

This data is from Example 14.1 in Design and Analysis of Experiments, 9th Edition.

Source

Montgomery, D. C. (2017) Design and Analysis of Experiments, 9th Edition. New York: Wiley.

Examples

# The column names
colnames(EX14_1Montg_data)

# Linear model
lm(Purity ~ Supplier, data = EX14_1Montg_data)

thoree/stat340 documentation built on June 30, 2024, 4:04 p.m.