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Data editing and management: Minimum base sizes

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Minimum base sizes

Data suppression

The data have been suppressed for certain cells in the data tables:

  • Where the unweighted number of respondents responding to the question overall or to an individual category is less than 30, results are not presented. LOW is used to indicate this.
  • Where the number of schools contributing to the results for an Active Partnership or local authority is two or fewer. The symbol ^ is used to indicate this.
  • Where the unweighted base for an Active Partnership or local authority is less than 150. The symbol ^ is used to indicate this.
  • Where there is no data available at all for that measure or demographic or geographic group, DNA is used to signify this. 

Flagged data

In the data tables, the absolute change in the significance table for Active Partnerships or local authorities may be highlighted in orange.

This indicates that the result is not based on all school year phases (a phase is defined as school years 1-2, school years 3-6 and school years 7-11).

The highlight indicates at least one of these school phases is missing from the Active Partnership or local authority’s result.

Alternatively, the result may also be highlighted when there is missing data from a particular term for the Active Partnership or local authority (e.g. if there are no responses during the Autumn term).

The Absolute change is highlighted in orange to indicate that this change needs to be interpreted with caution.

Please refer to the lookup table, which provides more detail on why that figure has been flagged, e.g. just school years 3-6 responses in academic year 2020-21 (Year 4) (i.e. missing school phases 1-2 and 7-11) or missing Summer term data in academic year 2021-22 (Year 5).

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