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)
Abhijeet Gaurav
You should purchase previous Years question booklet consisting of chapterwise question. If you want to practise a lot of questions then you should simply go for RS Aggrawal. It is the Best Book for step-wise practise & even difficulty level is also simplified step-wise. overall it's a best Book.