Carnations,
You appear to be answering your own question, " most of the science stream students? ". These are students that are pursuing Science. Science requires development, and a bachelors degree develops broad based knowledge allowing the student to sample from many areas within their educational persuit without commiting to a any single one aspect. A bachelors of Science gives a general understanding of the methods, purpose, and goals of that scientific precept.
I received my B.S.M.E. ( Mechanical Engineering ), I understand the importance of data, and data collection, and data interpretation.
I know these are general.
Hope this helps