A developmental psychologist thinks free preschool will improye the performance of low-income students. Suppose they recruit a sample of low-income 3- and 4-year- olds and randomly assign 5 to a free preschool condition, and 6 to a free daycare condition (similar to the preschool in terms of facilities and quality of care, but with no organized educational component]. The grades of both groups are compared once they reach 5th grade. Use o: = .10. Preschool Daycare M 30.3 ?5.333 33333 SD 11.15 13.99 N 40 411]