A school superintendent wants to know how his district's students did on a nationwide standardized achievement test. The test was administered to all on-site students. Unfortunately, 23 students in an EMR (educationally mentally retarded) program as well as 32 in a gifted program (very high IQ) attend classes off-site and so were not able to be tested. What measure of central tendency best summarizes the performance of all the district's students?
as we dont know the value of the scores ,median would be the best... View the full answer