Stress {BSDA}

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

Description

Data for Example 7.20

Usage

Stress

Format

A data frame/tibble with 12 observations on two variables

prestress

short term memory score before being exposed to a stressful situation

poststress

short term memory score after being exposed to a stressful situation

References

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.

Examples

diff <- Stress$prestress - Stress$poststress
qqnorm(diff)
qqline(diff)
t.test(diff)
## Not run: 
wilcox.test(Pair(Stress$prestress, Stress$poststress)~1, data = Stress)

## End(Not run)