QUESTION NO: 8
Suppose training data are oversampled in the event group to make the number of events and nonevents
roughly equal. A logistic regression is run and the probabilities are output to a data set
NEW and given the variable name PE. A decision rule considered is, "Classify data as an event if
probability is greater than 0.5." Also the data set NEW contains a variable TG that indicates
whether there is an event (1=Event, 0= No event).

data new；
set new；
solicit = PE > .5;
run;

proc means data=new(where (TG=1)) mean;
var solicit;
run;

懂了。 把solicit = PE > .5;理解错了

所以是什么意思呀？