Thank you, that was very helpful. Unfortunately, as my daughter will be 10yrs and 9 mths old when she takes the test, their example seems to say she will have to get over 90% right to get the minimum standardised points! Oh dear! Thank you, anyway, very helpful.
The standardised score 'ranking' relates to where your child kids relative to other children and makes no reference to the raw score achieved (other than, a higher standardised score indicates a higher raw score when looking at two scores in the same age group). So a standardised score of 100 represents the mean raw score for that group, be it 50% or 90%; all the other scores relate to that. A standardised score of 115 represents one standard deviation above the mean and about 34% of the children taking the test will have a score within this range. So a score of 115 means that the child has done better than about 84% (the 50% whose raw score was below the mean, plus the 34% from 100 to 115) - not
that said child has (necessarily) scored 84% in the exam. If it was a tough test, this standardised score may represent a raw score of, say, 60%. The actual figures for each exam will vary with the level of the test and the abilities of the actual cohort taking it.