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Post-16 Transitions: a Longitudinal Study of Young People with ...

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10.5.2 Weighting<br />

Table A.3 reports the achieved sample at Wave 2 against estimates<br />

<strong>of</strong> the number <strong>of</strong> Year 11 students in 2000 by school type and<br />

whether they had a statement <strong>of</strong> special educational need. 1<br />

As can be seen below, the number <strong>of</strong> young people in the Wave 2<br />

sample <strong>with</strong>out statements and from mainstream schools are<br />

under-represented, while students <strong>with</strong> statements are overrepresented.<br />

This has been corrected for in the data set through<br />

the use <strong>of</strong> cell based weighting. 2<br />

Table A.3: Estimates <strong>of</strong> the number <strong>of</strong> secondary level students <strong>with</strong> SEN and Wave 1<br />

distributions.<br />

Secondary school non-statemented (levels 2 to<br />

4)<br />

Wave 2<br />

Population<br />

N = % %<br />

593 34 54<br />

Secondary school statemented 638 36 24<br />

Special school statemented 505 29 22<br />

Special school – other 18 1 1<br />

Total 1,756 100 101<br />

Base for Wave 2 excludes cases in which the level <strong>of</strong> SEN was not known.<br />

The following chapters document the findings from the case<br />

studies alongside the data from the quantitative survey. All names<br />

have been changed to protect the identities <strong>of</strong> the young people<br />

who took part.<br />

1 The estimates are based on DfES figures collected from the Annual<br />

School Census. However in 2000, the data was not collected in a way<br />

that makes it possible to know how many were on stages 2 to 4 <strong>of</strong> the<br />

old SEN Code <strong>of</strong> Practice or how many <strong>of</strong> the SEN pupils were in<br />

Year 11. It has therefore been necessary to estimate this based on the<br />

ratio observed <strong>with</strong>in the overall sample from the Wave 2 PIF, which<br />

has been designed to be representative <strong>of</strong> the population.<br />

2 In the 120 cases where data were not available on SEN level,<br />

weighting was based on the school type alone.<br />

<strong>Post</strong>-<strong>16</strong> <strong>Transitions</strong> <strong>of</strong> <strong>Young</strong> <strong>People</strong> <strong>with</strong> SEN: Wave 2 151

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