AID21372: What do you understand by the term “Classification of Materials”? Also, explain the purpose of classification.

AID10002: A sample of 400 students of undergraduate and 400 students of post graduate classes were taken to know their opinion about autonomous college. 290 of the undergraduate and 310 of the post graduate students favoured the autonomous status. Present these facts in the form of a table and test at 5% level, that the opinion regarding autonomous status of colleges are independent of the level of classes of students.