IceSkating {PairedData}

Ice skating speed study

Description

This dataset gives the speed measurement (m/sec) for seven iceskating dancers using the return leg in flexion or in extension.

Usage

data(IceSkating)

Format

A dataframe with 7 rows and 3 columns.

[,1]	Subject	factor	anonymous subjects
[,2]	Extension	numeric	speed when return leg in extension (m/sec)
[,3]	Flexion	numeric	speed when return leg in flexion (m/sec)

Source

Private communication. Karine Monteil, CRIS, Lyon 1 University, FRANCE.

References

Haguenauer, M., Legreneur, P., Colloud, F. and Monteil, K.M. (2002) Characterisation of the Push-off in Ice Dancing: Influence of the Support Leg extension on Performance. Journal of Human Movement Studies, 43, 197-210.

Examples

data(IceSkating)

# Nothing particular in the paired plot
with(IceSkating,plot(paired(Extension,Flexion),type="McNeil"))

# The differences are normally distributed
with(IceSkating,qqnorm(Extension-Flexion))
with(IceSkating,qqline(Extension-Flexion))

# Usual t test
with(IceSkating,t.test(paired(Extension,Flexion)))