heplots: mathscore – R documentation

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mathscore

Math scores for basic math and word problems

Description

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).

Usage

data("mathscore")

Format

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

Source

Fictitious data

Examples

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")

heplots

Visualizing Hypothesis Tests in Multivariate Linear Models

v1.3-8

GPL (>= 2)

Authors

John Fox [aut], Michael Friendly [aut, cre], Georges Monette [ctb], Phil Chalmers [ctb]

Initial release

2021-01-20