You can read the data into R with lines such as

setwd$("$C:$/$ECN$410")$

toy $=$ read.csv$("$H$03.$toy.csv$",$ header $=$ T$)$

Create an indicator variable that equals $1$ when X$2$ is greater than or equal to $100.$ You can use the ifelse$()$ command to do this.

a$)$ Regress YA on X$1$ and X$2.$ What is the R squared value?

b$)$ Examine the plot of the residuals versus the fitted values.

True or False: the residuals appear to have no relationship with the fitted values.