Aang posted the following on a separate thread recently, as I too was wondering why the Boys' scores needed were higher this year... In the "Collated Cut Offs 2014 Thread". It's really interesting how removing some CCHS entrants has meant a skew in scores.
"I suspect the reasons the cut-off scores are slightly higher is not so much because there are proportionally more boys this year, but that there is proportionally fewer Chelmsford girls. Although the standardised mean score is 300, this is across Southend, Chelmsford and Colchester. My analysis suggests that the actual standardised mean for Southend candidates is closer to 290 and that of Chelmsford/Colchester is nearer 310. This year, CCHS has set their own CEM exam, and a consequence of this is that proportionally more higher raw scores have been removed from the sample. However, in the process of standardisation, the mean has to be back at 300 so the standardised scores get stretched out so to speak, so whereas a score of 330 in other years would now become 333. Colchester County High Schools would show a similar increased cut-off score, except that they have increased their intake this year. It is less about the boys vs girls mix, but rather the Southend vs Chelmsford/Colchester mix.
This would also support anecdotal evidence that there will be more Southend in catchment scores which exceed the pass mark of 303, and hence fewer spaces available for Southend area OOC, and subsequently higher cut-off scores for Southend OOC..
That's my opinion, for what it is worth..."