You have only one chance at this problem. The Admissions office collected the SAT scores of twenty randomly chosen students, from which they found a standard deviation of 27.5. If they wish to construct a 95% confidence interval for the average score for all students, should they use a z-interval or a t-interval, or do they not have enough information to use either? OA. They should use a z-interval OB. They should use a t-interval OC. They do not have enough information to use either