There are 1450 students at your school. The principal wants to get an idea of what kinds of programs she wants to offer for extra help and enrichment. She wants to survey 200 students. She first divides the students into groups by average grade on the report card. - 400 students had an average grade of A
- 485 students had an average grade of B
- 325 students had an average grade of C
- 170 students had an average grade of D
- 70 students had an average grade of F
Population: A:400 B:485 C:325 D:170 F:70
Determine how many of each group she should survey if she wants to do a stratified random sampling.