Littlemissgiggles wrote:
Wolczr wrote:
Can somebody provide me with the reassurance that we are okay on 352? We got 225 on the Bham test - my son found the Walsall test much easier. We are genuinely surprised by the disparity between the results.
Unfortunately only the LA can give you that assurrance on 1st March 2019. I'm not a gambling person but i'd bet fiver he will get into QMGS on that score.
Regarding the perceived disparity. It isn't really a disparity. The Birmingham and Walsall tests are marked in different ways.
Birmingham weighting is 50% of marks from Maths/NVR and 50% of marks from VR/literacy. The standardised average per section is 100, and 200 in total.
Whereas Walsall is marked with a third of marks for Maths, a third for NVR and a third for VR/literacy. The standardised 'average' is 100 per section this makes the overall average 300.
Based on this he has performed almost equally well in both exams and is likely of an offer on 1st March. Congratulations!
I think i need to explain myself rather better. I am no statistician so if my reasoning is erroneous, i am happy to be corrected. My reasoning is as follows.
My son scored 225 on the Bham test and 352 on the QM test. The average score of the Bham test is 200; the average score of the Walsall test is 300.
If we assume that the Standard Deviation (SD) on the Bham test is 25, then my son's score falls at the end of the first SD (i.e. +1SD or 225). If we assume that the SD on the Walsall test is 25, then my son's score falls in the third SD (with the third SD starting at 351). This is a huge difference, in a test, where small differences have large impacts.
Or, on a more pessimistic assumption. Lets assume that the SDs on both tests is 30. In which case my son falls just below the first SD (230) for the Bham test, and just below the second SD (360) for the Walsall test. A significant disparity.
Or, indeed, if we assume a 25 SD for the Bham test and a 30 SD for the Walsall test, then there nevertheless remains a significant disparity between the scores, which is most perplexing.
Anybody in the know out there who can help me with this?