but this time select the subset based on the value of the response y, according to the rules (1) all observations with |y| 1.5, and (3) all observations with y 2 , and the value of R 2 for these...

but this time select the subset based on the value of the response y, according to the rules (1) all observations with |y| <> 1.5, and (3) all observations with y <>², and the value of R²
for these three cases and for the regression fit to all the data.