Why is a sample size of 2500 students recommended for each of the Consortium student surveys?
Given the sampling considerations, the number of responses needed to have between 4 and 5% error and a 95% confidence interval is approximately 400-600 for an infinite size population. Given the typical response rate of between 15%-25%, your campus will need to survey 2500 students to obtain 500 completed responses. Larger sample sizes are highly recommended – especially for larger campuses and in the instances where no other national assessments are taking place.
