All About T-Score

[ngbrdad]

9studified:

What if have a score of this?


CL- 83
EL- 81
Math- 94
Science- 70

Total : ??

Please tell and explain the formula , I do not get it~!

You need the mean and SD of the cohort to calculate the T score.

[sssdarlings]

9studified:

What if have a score of this?


CL- 83
EL- 81
Math- 94
Science- 70

Total : ??

Please tell and explain the formula , I do not get it~!

some schools will explain to parents (during the P6 meet) and even demonstrate to students (from top classes?) how it can be calculated. You need to know the mean score of cohort to arrive at individual aggregate. Students' raw scores alone are not enough.

If having to choose between Exp/ NA, i would rather my child opt for NA. That way, the child is placed at top of NA students and higher chance of getting into school of choice (provided the school has NA)

I really wouldnt want scores between 200 to 225 or thereabouts, cos really not much choice schools- thats just my personal opinion.

Then again, i really want the child to make the best of the years in secondary school. The exam at the end of secondary education is more critical than PSLE.

[verysianmom]

Hi can someone tell me if HCL is useful if my daughter’s score is below 250?

[Pen88n]

verysianmom:

Hi can someone tell me if HCL is useful if my daughter's score is below 250?

HCL points are only applicable to top 30% of cohort. As to cut off of this top 30%, I'm not sure of the COP.

But if you intend your DD to go to a SAP school, I believe HCL foundation will help her in sec sch years.

[jtoh]

verysianmom:

Hi can someone tell me if HCL is useful if my daughter's score is below 250?

HCL scores are only useful if you're applying to SAP schools. If you score distinction, you can add 3 bonus points to your PSLE score, +2 for merit etc. So if adding the bonus points to your dd's PSLE score helps to get her into a SAP school, it'll help even if her score is <250. There are some SAP schools whose COP is <250.

[papaya99]

Can someone estimate the mean & standard deviation for all subjects for this year PSLE ? thank you.

[verykiasu2010]

papaya99:

Can someone estimate the mean & standard deviation for all subjects for this year PSLE ? thank you.

every year's questions and raw scores from the candidates are different

you won't be able to estimate till the scripts are marked and scored

normally it ranges between 8 to 16 for the SD of each subject, depends on each year's cohort

easy papers mean smaller SD, harder paper means higher SD

[vlim]

verykiasu2010:

papaya99:

Can someone estimate the mean & standard deviation for all subjects for this year PSLE ? thank you.

every year's questions and raw scores from the candidates are different

you won't be able to estimate till the scripts are marked and scored

normally it ranges between 8 to 16 for the SD of each subject, depends on each year's cohort

easy papers mean smaller SD, harder paper means higher SD

i thought is opposite .. :?

[Pen88n]

vlim:

verykiasu2010:

[quote=\"papaya99\"]Can someone estimate the mean & standard deviation for all subjects for this year PSLE ? thank you.

every year's questions and raw scores from the candidates are different

you won't be able to estimate till the scripts are marked and scored

normally it ranges between 8 to 16 for the SD of each subject, depends on each year's cohort

easy papers mean smaller SD, harder paper means higher SD

i thought is opposite .. :?[/quote]Vlim, agreed. I think it should be:
Easy paper => higher mean, wider spread, SD larger => overall lower T-score for that subject
Difficult paper => lower mean, centred around mean, SD smaller => T-score can be high if excel in paper

[verykiasu2010]

easier papers mean many many of the candidates will score around the same high marks, meaning the variance from the mean (average) is smaller, hence the standard deviation is small. yes the mean is higher but the many people crowing around the mean means that the variance is small


if the paper is tough, only the real high achievers 9not so many) are able to score high high, and the average (mean) will be much lower than the high achievers.....hence the variance from the mean is wider, giving you a higher standard deviation

that is why is a year of easy paper, highest t-score seem to be low, at most a low 28x, where as in a year of tough papers, the highest t-score could be 29x

http://en.wikipedia.org/wiki/Standard_deviation


Interpretation and application

A large standard deviation indicates that the data points are far from the mean and a small standard deviation indicates that they are clustered closely around the mean.

For example, each of the three populations {0, 0, 14, 14}, {0, 6, 8, 14} and {6, 6, 8, 8} has a mean of 7. Their standard deviations are 7, 5, and 1, respectively. The third population has a much smaller standard deviation than the other two because its values are all close to 7. In a loose sense, the standard deviation tells us how far from the mean the data points tend to be. It will have the same units as the data points themselves. If, for instance, the data set {0, 6, 8, 14} represents the ages of a population of four siblings in years, the standard deviation is 5 years.