bike {SMPracticals}R Documentation

Bicycling Times

Description

The times taken to cycle up a hill, as function of the bicycle seat height, use of dynamo, and tyre pressure. 16 runs were made using a factorial design.

Usage

data(bike)

Format

A data frame with 16 observations on the following 11 variables.

day
Day of run
run
Order of run
seat
Seat height: -1 indicates 26 inches, 1 indicates 30 inches
dynamo
Use of dynamo: -1 indicates not used
tyre
Tyre pressure: -1 indicates 40 psi, 1 indicates 55 psi
dayf
factor corresponding to day
runf
factor corresponding to run
seatf
factor corresponding to seat height
dynamof
factor corresponding to use of dynamo
tyref
factor corresponding to tyre pressure
time
Run time (seconds)

Source

Box, G. E. P., Hunter, W. G. and Hunter, J. S. (1978) Statistics for Experimenters. New York: Wiley.

References

Davison, A. C. (2003) Statistical Models. Cambridge University Press. Page 357.

Examples

data(bike)
anova(lm(time~dayf+runf+seat+dynamo+tyre,data=bike))

[Package SMPracticals version 1.3 Index]