Do you think that there is a relationship between women's heights and their weights? If you said yes, congratulations, you're right!
We can verify this assertion using the data in R's built-in dataset, women, which holds the height and weight of 15 American women from ages 30 to 39:
head(women)
height weight
1 58 115
2 59 117
3 60 120
4 61 123
5 62 126
6 63 129
nrow(women)
[1] 15
Specifically, this relationship is referred to as a positive relationship, because as one of the variable increases, we expect an increase in the other variable.
The most typical visual representation of the relationship between two continuous variables is a scatterplot.
A scatterplot is displayed as a group of points whose position along the x axis is established by...
