Highest package will be of some CS guy, who will have a high package of 18 lakhs, but the problem is that the increment over time will be low. Lowest will be some chemical guy probably, but the increment will be higher. If a chemical guy gets a 3 lakh package initially in a core company, he will eventually earn 30 lakhs 10 years later whereas the CS guy will earn 25 lakhs
Also, there is the dilemma between choosing a core and non core company. Non core companies pay more than core initially but the increment is low and the job is boring and unsatisfactory. Non core companies are analytic companies whereas core companies are the industrial companies.
Quite honestly, placement statistics will tell you that the package you will get will be good (i. e. you will get what you deserve and you will be happy) , if you have the apt knowledge (i.e. reasonable cgpa). There are many factors which influence placement statistics. Some students want to get a job whereas some want to study further. Some students are brilliant after 4 years whereas others don’t make the cut. All of them have the same potential and you have to make the most of your time. This doesn’t mean that you study everyday, 24/7. Normally toppers start studying 2 weeks before the exam and go to all classes. The rest of the time, it is important for you to socialise and develop your personality.