morley {datasets} | R Documentation |
The classical data of Michaelson and Morley on the speed of light. The data consists of five experiments, each consisting of 20 consecutive ‘runs’. The response is the speed of light measurement, suitably coded.
morley
A data frame contains the following components:
Expt
Run
Speed
The data is here viewed as a randomized block experiment with ‘experiment’ and ‘run’ as the factors. ‘run’ may also be considered a quantitative variate to account for linear (or polynomial) changes in the measurement over the course of a single experiment.
A. J. Weekes (1986) A Genstat Primer. London: Edward Arnold.
require(stats) morley$Expt <- factor(morley$Expt) morley$Run <- factor(morley$Run) attach(morley) plot(Expt, Speed, main = "Speed of Light Data", xlab = "Experiment No.") fm <- aov(Speed ~ Run + Expt, data = morley) summary(fm) fm0 <- update(fm, . ~ . - Run) anova(fm0, fm) detach(morley)