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An IERI – International Educational Research Institute Journal

Table 1 Mapping of ordinal NAPLAN SES measures onto interval scales

From: The substantiveness of socioeconomic school compositional effects in Australia: measurement error and the relationship with academic composition

Measure

Ordinal scale

Interval scale

Mother/father education

1 = Grade 9 or below

9

 

2 = Grade 10

10

 

3 = Grade 11

11

 

4 = Grade 12

12

 

5 = Certificate I–IV

13

 

6 = Diploma

14

 

7 = Degree of higher

15

Mother/father occupation

  
 

1 = Senior management

81.1a

 

2 = Other business manager

56.6a

 

3 = Trades, clerks, sales and service staff

40.4a

 

4 = Machine operators

30.4a

  1. aAverage AUSEI06 score for each category