Yes, you need the mean and standard deviation scores for each year.

These are

**Quote:**

CSSE have kindly responded to my query on the official statistics for 2014 11+ exam for 2015 entry

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11+ Standardisation Report – October 2014

Each pupil's raw scores were standardised (mean=100, standard deviation=15). The values used, in 2014, are presented in the table below.

2014 (2015 entry) Mean Standard Deviation

English __________33.174 __________8.665

Maths __________38.349 __________ 10.709

In each case the calculation proceeds as follows:

Standardised score = (((raw score - mean) /standard deviation) x 15) + 100

Total score = 1.5 x standardised Mathematics + 1.5 x standardised English.

Thus a candidate with average marks on each paper will obtain a total of 300, comprising the results in the two papers weighted 1:1.

and for 2015 (2016 entry)

**Quote:**

For all those who are interested I have posted below this year's CSSE mean scores and standard deviation figures.

English: Mean score (out of 60) =30.4783, Standard Deviation = 9.2468

Maths: Mean score =35.9650 (out of 60), Standard Deviation = 12.7833

same calculation as for previous year, just plug your results in to get standardized score for each year.

Hope this helps.