$10N9$

saved

What does the following code do $($you may look at either the R or SAS code$)?$

out of $1\mathrm{.}00$

SAS:

data classdata;

set classdata;

if optimism$>50$ then IsOptimistic$=1$;

else if optimism$>=0$ and optimism then IsOptimistic$=0$;

run;

R:

classdata$isOptimistic ifelse$($classdata$optimism $>50,1,)$

Select one:

a$.$ Removes observations with optimism $>50$

b$.$ Creates a new binary variable

c$.$ Flags values of the variable "optimism" that are unrealistic

d$.$ Divides the dataset into two smaller datasets

Clear my choice