Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Arzoo
Proofs of theorems will help you during your Msc. If you have extra time then you can go through the proofs of the theorems. But if we consider jam only then applications of theorems will also works. It needs practice. I hope this answer will help you.