Question re standardisation calculation
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Question re standardisation calculation Guest 55 possibly???
A child scores 101 raw score with an age standardized score of 216.
216/101 = 2.138614 – the standardizing factor.
Pass mark 221 age standardized score translates as 221/2.138614= 104 raw score.
Therefore although child misses by 5 (standardized) marks, they only actually needed to get three more questions correct to pass.
Are my calculations correct, or have I (as I suspect) rather naiively over simplified everything?
B x
216/101 = 2.138614 – the standardizing factor.
Pass mark 221 age standardized score translates as 221/2.138614= 104 raw score.
Therefore although child misses by 5 (standardized) marks, they only actually needed to get three more questions correct to pass.
Are my calculations correct, or have I (as I suspect) rather naiively over simplified everything?
B x
Hi Bougalou
There is not a simple conversion factor.
However an Age Standarded score of 216 will almost certainly be the sum of 2 Standardisations (with an average of 108 which is the 70th percentile of candidates)
If one of the raw scores was 101 then you need to find out what the other raw score was for the other exam component and what each of the respective Age Standaised Scores were which resulted in a total of 216.
The LEA should tell you this.
You can also request the Age Standised Conversation tables for the exam from the LEA, if necessary under the Freedom of Information Act.
Regards
There is not a simple conversion factor.
However an Age Standarded score of 216 will almost certainly be the sum of 2 Standardisations (with an average of 108 which is the 70th percentile of candidates)
If one of the raw scores was 101 then you need to find out what the other raw score was for the other exam component and what each of the respective Age Standaised Scores were which resulted in a total of 216.
The LEA should tell you this.
You can also request the Age Standised Conversation tables for the exam from the LEA, if necessary under the Freedom of Information Act.
Regards