Question

1. Use the Galton dataset from the mosaicData package in R STUDIO

library(mosaic)

1. Create a scatter plot to show the relationship between height against father’s height (x=father, y=height)

2. What relationship did you see? (Use comments to write in your R Markdown file)

3. Separate your plot into facets by sex

4. Add a regression line using the “lm” method to both of your facets

5. Generate a box plot of height by sex.

2. Use the RailTrail data from the mosaicData package

library(mosaic)

1. Generate a scatter plot to show the relationship between the number of crossings per day volume against the high temperature that day

2. Separate your plot to facets by weekday

Answer 1

library(mosaic)
library(ggplot2)
head(Galton)
###part a
p <- ggplot(Galton, aes(x=father, y=height)) + geom_point(shape=1)
p
###part b
### from scatter plot, we can see fathers height and height have +ve corelation and are nearly
### in linear relation

###part c
p + facet_grid(sex ~ .)   

####part d
p+facet_grid(sex ~ .) +geom_smooth(method="lm")

######part e

ggplot(Galton, aes(x=sex, y=height)) + geom_boxplot(notch=TRUE)

library(mosaic)
library(ggplot2)
head( RailTrail )
###part a
p <- ggplot(RailTrail , aes(x=hightemp , y=volume )) + geom_point(shape=1)
p

###part b
p + facet_grid(weekday~ .)