Short-term memory test scores on 12 subjects before and after a stressful situation

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Description

Data for Example 7.20

Usage

1

Format

A data frame with 12 observations on the following 2 variables.

Prestre

a numeric vector

Poststre

a numeric vector

Source

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Duxbury

Examples

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str(Stress)
attach(Stress)
DIF <- Poststre -Prestre
qqnorm(DIF)
qqline(DIF)
shapiro.test(DIF)
t.test(Poststre,Prestre,paired=TRUE,alternative="less")
detach(Stress)
remove(DIF)

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