Answer:
Proportions of students who were surveyed form a sample from the total number or population of students
Explanation:
Proportion of respondents is a sample of students taken from an entire population or the entire student body choosen to represent the entire student pody. The proportion of respondents who said that they are first attenders will differ from actual proportion of 1st attenders from entire student body by some amount called standard deviation. If another group pf respondents is investigated, it may or may not have same proportion of 1st attenders. the extent to which this other group of respondents will have same proportion of 1st attenders will be given by a parameter called confidence interval.