IceSkating: Ice skating speed study

In PairedData: Paired Data Analysis

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)))

Example output

Loading required package: MASS
Loading required package: gld
Loading required package: mvtnorm
Loading required package: lattice
Loading required package: ggplot2

Attaching package: ‘PairedData’

The following object is masked from ‘package:base’:

    summary


	Paired t-test

data:  Extension and Flexion
t = 2.9347, df = 6, p-value = 0.02613
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
 0.01804536 0.19909749
sample estimates:
mean of the differences 
              0.1085714 

PairedData documentation built on May 1, 2019, 6:49 p.m.