Suppose the percentage of male students enrolling in econometrics units at a university has increased from 42 per cent to 49 per cent. What is the correct interpretation? 1) The male student enrolment in econometrics units has increased by 7 per cent. 2) The male student enrolment in econometrics units has a proportion of 16.66 per cent. 3) The male student enrolment in econometrics units increased by 7 basis points. 4) The male student enrolment in econometrics has increased by 16.66 percentage points. 5) The male student enrolment in econometrics units has increased by 7 percentage points