All About T-Score

[atutor2001]

Hi Crazydad, you are great. Thanks. Is it a typo error? 50-10*… or 50+10*…

[CrazyDad]

Sorry, it should be 50 + 10 *...

Thanks for correction.. :oops:

[atutor2001]

Oh my …!


Those who score 100 for math will get a T-score of 91.

Those who score 100 for science (near impossible) will only get a T-score of 77.5

100 in English (another impossible case) the T-score will be 74.5

100 in Chinese (for PRC) the T-score will be 72.

I hope you will now understand why I have made so much noise regarding the Math paper. There will be at least 50 pupils out there who get 100 for math, enjoying a disproportionate jump in their T-score.

Anyway, MOE will sure have to moderate the marks. Otherwise the top student will have an aggregate T-score of over 300 (a new record)

[tutormum]

Using the formula together with highest possible scores and lowest possible scores, I've got unrealistic results. :? Can you please help me as I'm dumb in this. PLEASE, PLEASE, CrazyDad

What will my son's score be if he gets:
Maths 88
Science 80
Chinese 80
English 80
:love:

[Dharma]

atutor2001:

Oh my ...!


Those who score 100 for math will get a T-score of 91.

Those who score 100 for science (near impossible) will only get a T-score of 77.5

100 in English (another impossible case) the T-score will be 74.5

100 in Chinese (for PRC) the T-score will be 72.

I hope you will now understand why I have made so much noise regarding the Math paper. There will be at least 50 pupils out there who get 100 for math, enjoying a disproportionate jump in their T-score.

Anyway, MOE will sure have to moderate the marks. Otherwise the top student will have an aggregate T-score of over 300 (a new record)

Hi atutor2001,

Thought max possible T-score is 75.

[atutor2001]

tutormum:

Using the formula together with highest possible scores and lowest possible scores, I've got unrealistic results. :? Can you please help me as I'm dumb in this. PLEASE, PLEASE, CrazyDad

What will my son's score be if he gets:
Maths 88
Science 80
Chinese 80
English 80
:love:

The estimated T-score will be:

CL - 52.0
EL - 56.4
M - 77.8
Sc - 60.8

Total : 247

[finder]

CrazyDad:

Hi All,

.......

I have estimated the parameter to calculate the T score as followed;
CL: Mean = 78, StdDev = 10
EL: Mean = 73, StdDev = 11
Math : Mean = 63, StdDev = 9
Sci : Mean = 67, StdDev = 12

:xedfingers:

CL 78, quite disadvantage for those strong at it.

[atutor2001]

Dharma:

Hi atutor2001,

Thought max possible T-score is 75.

Unless MOE have set a maximum cut-off at 75, which I have not come across.

Otherwise, using the statistic formula, if out of 5000 studetns, everyone gets 0 and Tom is the only boy with 100, the T-score of Tom will be 50050 because the standard deviation is very very small - 0.02

[Dharma]

CrazyDad:

Hi All,

Base on the feedback from all parents and using the result from 2007. 2007 PSLE is pretty similar to 2009; very difficult math, easy Chinese and some tricky Science questions.

I have estimated the parameter to calculate the T score as followed;
CL: Mean = 78, StdDev = 10
EL: Mean = 73, StdDev = 11
Math : Mean = 63, StdDev = 9
Sci : Mean = 67, StdDev = 12

Use the formula : 50 - 10 * (your score - Mean)/StdDev
for each subject. Sum them up, you should get a glimps.

:xedfingers:

Hi crazydad,

Seems like your SDs are bit low for the difficult papers. Because w/ your estimated figures, a child who scores an average of 96 for all 4 subjects will get an aggregate score of 302 > 300.

[Poonie]

CrazyDad:

Hi All,

Base on the feedback from all parents and using the result from 2007. 2007 PSLE is pretty similar to 2009; very difficult math, easy Chinese and some tricky Science questions.

I have estimated the parameter to calculate the T score as followed;
CL: Mean = 78, StdDev = 10
EL: Mean = 73, StdDev = 11
Math : Mean = 63, StdDev = 9
Sci : Mean = 67, StdDev = 12

Use the formula : 50 - 10 * (your score - Mean)/StdDev
for each subject. Sum them up, you should get a glimps.


:xedfingers:

Shouldn't the mean for Eng and MT be around 100+ since the total score is 200 respectively?