if my son get the following resutls for psle on 2011，
what will be his aggregate score，and which secondary schools would he get to choose？
How is T-Score calculated for each subject?
We apply the following formula:
Where: X is the pupil’s mark for the subject
Y is the average mark (mean) scored by all the
Z is the spread of the marks around the
average mark (standard deviation) http://www.sciencebuddies.com.sg/pdf/tscore.pdf