He added that the board's internal audit - which looked at a sample of statistics - found no evidence of "deliberate instructions" being given to members of staff regarding the "inappropriate use of waiting times codes".

BBC: NHS staff 'felt pressure' to meet waiting times targets

From the people who join the page I'll be selecting a 'stratified sample' (that's my statistics GCSE maths coming in there) to analyse for my experiment.

BBC: Facebook profile photo experiment goes live

The new report is due to be carried out over the coming months by Ofsted inspectors visiting a sample of more than 50 secondary schools, looking at statistics on gifted and talented provision and pupil progression, according to Sir Michael.

BBC: Ofsted chief voices fears for brightest pupils

Up until recently, the predominant approach has been frequentist statistics, the kind you most likely learned in school, which utilizes controlled variables and large sample sizes to arrive at conclusions that are statistically significant.

FORBES: Strategy at Digital Speed