chapter_7_table_1: The data used in Chapter 7, Table 1

Description Usage Format Details Variables Synonym Author(s) Source References Examples

Description

The data used in Chapter 7, Table 1

Usage

1

Format

An object of class data.frame with 20 rows and 2 columns.

Details

This data is the hypothetical data from a psychologist's evaluation of the effectiveness of biofeedback and drug therapy for treating hypertension (lowering blood pressure). There are four groups: both biofeedback training and drug therapy, biofeedback but not drug therapy, drug therapy but no biofeedback, and neither biofeedback nor drug therapy... As usual, in this data set, the number of subjects is kept small to minimize the computational burden. We assume that the scores in the table represent systolic blood pressure readings taken at the end of the treatment period.

The following data consists specifically of blood pressure measurements taken after the end of treatment for five individuals that were randomly assigned to one of four groups. The initial question of interest is whether there is a significant difference between any of the group means, that is, are all of the population group means equal or is there a difference somewhere.

As before, we can perform a one-way ANOVA via the One-Way ANOVA procedure to replicate the results given in Table 7.2.

Variables

group

a numeric vector between 1 and 4 equal to the drug therapy group

score

the blood pressure of one of the individuals in the study

Synonym

C7T1

Author(s)

Ken Kelley [email protected]

Source

https://designingexperiments.com/data/

Maxwell, S. E., Delaney, H. D., \& Kelley, K. (forthcoming). Designing experiments and analyzing data: A model comparison perspective. (3rd ed.). Routledge.

References

Maxwell, S. E., Delaney, H. D., \& Kelley, K. (forthcoming). Designing experiments and analyzing data: A model comparison perspective (3rd ed.). Routledge.

Examples

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# Load the data
data(chapter_7_table_1)

# Or, alternatively load the data as
data(C7T1)

# View the structure
str(chapter_7_table_1)

AMCP documentation built on May 30, 2017, 8:14 a.m.