Ideally we need the NFER local standardized look up table for this cohort, but I doubt that will be Publically available even until the whole cohort has taken the tests, including late sitters
As I understand it, on the Lhs we have raw scores & on the top the age of the child at the test date ( in completed months). From the final bunch of marks Nfer make up a standardized score for each raw score: age axis combinations. This ensures that dcs are only compared to the same age as themselves & that the same proportion of dcs in each age group obtain the pass mark.
So we will have the raw score going in & the standardized score coming out of the "magic black box" (which has the complicated converting equation inside)
Each 11+ year has a unique box.
But, if we wish to get a very rough idea ( of the ballpark figures), we can try & use previous years in & out scores, to very roughly guess a simple & possibly misleading version of the real equation.
If we want to do this, then we need the following information>
Raw scores in, standardized scores out & age group sub- division of child e.g. 10Y:06M.
Even better would be to get a historical Redbridge look up table as well
. I wonder do Nfer or LBR make these publicly accessible & if not, why not, after all we ultimately pay their wages?