Higher Education Minister S. B. Dissanayake yesterday told Parliament that the Z-score formula was only a mathematical formula and not an invention by Prof R. O. Thattil.
In reply to a statement by Opposition Leader Ranil Wickremesinghe that the creator of the Z- score formula Prof Thattil, too, was against the way the formula had been distorted by the Department of Examinations causing a mess-up in the GCE (A-Level) results, Minister Dissanayake said the fact that the examination would be conducted under two syllabuses had been known to all stakeholders for the past three years or so.
There was a need for obtaining the mean value of the marks obtained by every candidate to select him or her for university admission, he said.
Minister Dissanayake said: “Prof. Thattil faults us for not including him on the expert panel to look into the problem. He was not invited to the committee because he had submitted a document in a court case a few years back that the Z score was incorrect and the court had rejected it. That was why we did not invite him this time around.”
The Z score formula was introduced in 2000 to scale the GCE (A-Level) results so that the average of the Z scores received for different subjects could be used in ranking, Minister Dissanayake said.
Courtesy: The Island