85th percentile
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Ok - now this is confusing me.
My DD has just "failed" a test for a school that runs own selection process. She scored 234 over two tests - the required mark was 236. Now - by my reckoning - and any information I can find on percentiles - a Score of 117 & 117 is the 87th percentile.
The school is offering to 135 chldren so by my reckoning around 1000 children must have sat the test if a pass mark of 236 makes sense. I am reliably informed the number that actually sat the test this year is actually around 350.
So my questions is - how - if my DD is in top 13% - did she not make one of the 135 places out of a total cohort of 350?
Also - the pass rate remains the same each year - in reality - shouldn't it be adjusted based on the number taking the test - to fill the 135 places?
I'm quite good at maths but this has got me really confused - can someone help? My working out says that with a total cohort of 350 - to get 135 offers - the pass rate would be 104 or 105. 62nd percentile and above.
The reason I was asking is that I am appealing and was trying to work out how many others would have scored 234 & 235?
Any help would be great!
Wirral Dad
My DD has just "failed" a test for a school that runs own selection process. She scored 234 over two tests - the required mark was 236. Now - by my reckoning - and any information I can find on percentiles - a Score of 117 & 117 is the 87th percentile.
The school is offering to 135 chldren so by my reckoning around 1000 children must have sat the test if a pass mark of 236 makes sense. I am reliably informed the number that actually sat the test this year is actually around 350.
So my questions is - how - if my DD is in top 13% - did she not make one of the 135 places out of a total cohort of 350?
Also - the pass rate remains the same each year - in reality - shouldn't it be adjusted based on the number taking the test - to fill the 135 places?
I'm quite good at maths but this has got me really confused - can someone help? My working out says that with a total cohort of 350 - to get 135 offers - the pass rate would be 104 or 105. 62nd percentile and above.
The reason I was asking is that I am appealing and was trying to work out how many others would have scored 234 & 235?
Any help would be great!
Wirral Dad
If a child is in the, say, top 10% of the general population, this means that in any random group of children, the child will be in the top 10. But it isn't a random set of children that sit these exams. Children of average and below average ability may not be entered for the test. It is possible that all of the children entered for the test are in the top 25% of the general population.
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There's a thread here somewhere which someone will point out, but basically the mark you quote isn't an actual score ie the number of raw marks scored for the questions but rather has been converted and shows where your child has come in relation to other candidates which is why it doesn't change, I think!!
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