Moving to another question will save this response. Question 9 The student council of your school wants to conduct a survey regarding the student service? You have advised them that it might be best to conduct a stratified random sample of the student body which of the following is not a valid stratified designt O Two simple random samples are conducted: one of students whose GPA'S are 2.5 or hugher and the other of students whose GPAs and less than 2.5. ASRS of five classes and every student in each of the five classes is surveyed. Two SRS's are to be drawn one of the boys and the other of the girls in the student body. O Four simple random Samples are conducted: one in each of the four major departments. A Moving to another question will save this response. acermight be best to conduct a stratified random sample of the student body Assuming the results of the separate sampled will be combined men a sagje cumplejul the whose GPA's are less than 2.5. acer