how to calculate ranking points?
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As in title.
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science and maths add up to 100.
mother tounge 100
english 100
total 300 points.
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Not correct hor, please see the explanation by firepig in her tread PSLE result lah. She showed the corect way to calculate the actual PSLE T score using the formula provided by MOE hor.
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Ranking pts is simi?
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where?
so my teacher lied to me all this years?
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now no more ranking. now only got two determinants.
elite.
non-elite.
choose wisely.
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Originally posted by skythewood:
where?
so my teacher lied to me all this years?
This is copied from firepig's reply hor.
Example of how T-score is calculated
Li Ting’s score for Mathematics – 90 (X)
Average score of cohort – 75 (Y)
Standard Deviation - 20 (Z) (this means 2/3 of cohort scored from 55 to 95)
Using the T-Score formula
T = 50 + 10(X – Y) / Z
T = 50 + 10 x (90 – 75) / 20
= 50 + 10 x 15/20
= 50 + 10 x 0.75
= 57.5
Li Ting’s T-score for Mathematics is 57.5
Now that we have covered T-score, we can take a look at PSLE Aggregate Score.
Using T-Score to Calculate PSLE Aggregate Score
Let’s now take a look at Li Ting’s total performance
The cohort’s average and standard deviation plays a big part in Li Ting’s score. To demonstrate, let’s move the average scores of all subjects down by 10 marks each, keeping all other variables (raw score and SD) constant. This is how Li Ting’s score will now look like.
Take note that Li Ting’s aggregate goes up from 245 to 260 when the averages of all subjects went down by 10 marks each. This shows that if the cohort is weaker, Li Ting’s aggregate score will increase, even if she scores the same marks for all the subjects.
It is therefore not accurate to compare a student’s aggregate score in a particular year, to the aggregate score of another student in a different year. Each year will have a different average for all the subjects.
Parents who have more than 1 child, tend to compare each child’s PSLE Aggregate Score with his/her sibling's score. This is not a very fair comparison.
Final Note –
Because PSLE aggregate score is based on T-scores, theoretically, there is no such thing as “maximum aggregate score”.
Many parents believe the (non-existent) maximum aggregate is 300. That is a misconception.
To demonstrate, I have bumped up Li Ting’s score (in Table 3) to full marks for all her subjects, using the same averages and SDs found in Table 2.
Note that although Li Ting scored 100% marks for all subjects, her PSLE Aggregate Score is only 286. She did not score the (imaginary and non-existent maximum) PSLE Aggregate Score of 300!
The only way to score that 300 (or even above that), is to have a very weak cohort in your year.
So if our imaginary Li Ting scored 100% for all her subjects and still only scored 286 for her PSLE Aggregate, how did Ms Natasha score a PSLE Aggregate of 294 for the year 2007? I don’t have the stats, but my guess is that the averages and SDs of the individual subjects of the cohort played a big role.
In any case, 294 is a respectable score, and we should give credit where it is due. It is an all time high and Ms Natasha definitely deserves the recognition for her outstanding performance.
I hope the article in this post gives parents and students a better picture how PSLE Aggregate Scores are calculated. -
isn't that.... 100 from english, 100 from mother tongue and 100 from maths/science?
with some moderation?
