No, you need to replace NETID with your netid in the URL

http://www.math.stonybrook.edu/~scott/mat331.fall19/problems/proj1data/NETID.txt

for example, if you are Terrence Estcase and your netid is testcase, you
would use 

http://www.math.stonybrook.edu/~scott/mat331.fall19/problems/proj1data/testcase.txt