The given pie charts compare responses of undergraduate and posgraduate students about a university library. Overall, the majority of postgraduate students completely satisfied with range of books in the library, in contrtast, undergraduate students found non-printed material were prefect.
It is immediately apparent that the proportions of both groups who found non-printed material very bad, were approximately the same, about 24% on average. Besides, the data reveal that non-printed material might be more usefull for undergraduate student than the other. Because, 52% of them voted very good to those material, in contrary to just 27% of postgraduate students. Moving on to the range of books, they had significantly different views about this question. The proportions of undergraduate and postgraduate students who find the range of books satisfacatory, were 50% and 33%, respectively. Furthermore, the proportion of undergraduate students who their responses were very good, reaching double that of other group, around 55%.
In conclusion, while most postgraduate students found the range of books in library very good, undergraduate students found that just satisfactory. Interestingely, this results were opposite for non-printed material.