ergoStool {nlme} | R Documentation

## Ergometrics experiment with stool types

### Description

The `ergoStool` data frame has 36 rows and 3 columns.

### Format

This data frame contains the following columns:

effort
  a numeric vector giving the effort (Borg scale) required to arise from a stool.
Type
  a factor with levels `T1`, `T2`, `T3`, and `T4` giving the stool type.
Subject
  an ordered factor giving a unique identifier for the subject in the experiment.

### Details

Devore (2000) cites data from an article in Ergometrics (1993, pp. 519-535) on ``The Effects of a Pneumatic Stool and a One-Legged Stool on Lower Limb Joint Load and Muscular Activity.''

### Source

Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S and S-PLUS, Springer, New York. (Appendix A.9)

Devore, J. L. (2000), Probability and Statistics for Engineering and the Sciences (5th ed), Duxbury, Boston, MA.

### Examples

    data(ergoStool)
    fm1 <-
       lme(effort ~ Type, data = ergoStool, random = ~ 1 | Subject)
    anova( fm1 )

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