Yes, but we know neither the size of the population nor the confidence interval had the full 120 students responded. Secondly, non-responses may actually corre

Yes, but we know neither the size of the population nor the confidence interval had the full 120 students responded. Secondly, non-responses may actually correlate to the topic questions! For all anyone knows, students may not respond because - too busy studying - too busy partying - too busy with intramural sports - too disillusioned, feeling that it will not make a difference. Etc