ex. We want to survey students’ opinions to food services offered on campus.

Freshmen: 1624 = 27.8% Sophomores: 1506 = 25.8%

Juniors: 1375 = 23.6% Seniors: 1327 = 22.8%

Total sample size = 200.

Stratified sample:

Freshmen: 200 x .278 = 55.6

Sophomores: 200 x .258 = 51.6

Juniors: 200 x .236 = 47.2

Seniors: 200 x .228 = 45.6

*Need to decide on rounding to get a sample size of 200.