Description Usage Format Source Examples

Scores for two groups of school children taught by different math teachers and tested for both basic math (BM) problems and solving word problems (WP).

1 | ```
data("mathscore")
``` |

A data frame with 12 observations on the following 3 variables.

`group`

a factor with levels

`1`

`2`

`BM`

Basic Math score, a numeric vector

`WP`

Word Problems score, a numeric vector

Fictitious data

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | ```
data(mathscore)
str(mathscore)
math.mod <- lm(cbind(BM, WP) ~ group, data=mathscore)
car::Anova(math.mod)
# scatterplot with data ellipses
car::scatterplot(WP ~ BM | group, data=mathscore,
ellipse=list(levels=0.68), smooth=FALSE, pch=c(15,16),
legend=list(coords = "topright"))
# HE plot
heplot(math.mod, fill=TRUE,
cex=2, cex.lab=1.8,
xlab="Basic math", ylab="Word problems")
``` |

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