Aforest ranger might count the number of trees in a certain area of the forest as a sample to get an idea of the total number of trees in the whole forest. this is called

i think it's stratified sampling

with such great emphasis put on the act and sat exams—the studying, the review sessions, taking the test, retaking the test, scholarships dependent on scores, etc.—many think the scores are the be all end all of college applications. if you have a high score, you can get into any college you want. if you have a low score, you’re doomed.

what am i trying to do? solve?