Appendix 1: Statistics of schools in the sample for this report

ERO evaluated progress with success for Māori in all schools where an education review took place in Terms 2 and 3, 2009. The types, locality (urban or rural), decile range and roll size groups of schools are shown in Tables 1 to 4 below.

Table 1: School types

School type	Number	Percentage of sample	National percentage^[28]
Full primary (Y1-8)	104	36	44
Contributing (Y1-6)	110	38	31
Intermediate (Y7-8)	9	3	5
Special School	4	2	2
Secondary (Y7-15)	12	4	4
Composite (Y1-15)	8	3	5
Secondary (Y9-15)	40	14	9
Total	287	100	100

Table 1 shows that the types of schools in this evaluation are representative of national percentages for most school types. Year 9-15 secondary and contributing primary schools were slightly over-represented, and full primary schools were under‑represented. These differences were not statistically significant^[29].

Table 2: School locality

Locality	Number	Percentage of sample	National percentage
Urban	224	78	71
Rural	63	22	29
Total	287	100	100

Table 2 shows that the sample of schools in this evaluation are representative of the national percentages of urban and rural schools.

Table 3: School decile ranges

Decile^[30]	Number	Percentage of sample	National percentage
Low decile (1-3)	79	27	31
Middle decile (4-7)	120	42	39
High decile (8-10)	88	31	30
Total	287	100	100

Table 3 shows that the sample of schools in this evaluation is representative of the national percentages of schools in each decile range.

Table 4: School roll size group

Roll size	Number	Percentage of sample	National percentage
Small (0-150 primary, 0-300 secondary)	90	31	45
Medium (151-300 primary, 301-700 secondary)	81	28	26
Large (301 primary, 701 secondary)	116	41	29
Total	287	100	100

Table 4 shows that the roll size groups are not representative of national percentages. The sample includes fewer small schools and more large schools. The differences were statistically significant.

The national percentage of each school type is based on the total population of schools as a 1 July 2009. For this study it excludes kura kaupapa Māori and The Correspondence School. This also applies to Tables 2 to 4.
The differences between observed and expected values were tested using a Chi square test, as were differences in roll size values.
A school’s decile indicates the extent to which a school draws its students from low socio-economic communities. Decile 1 schools are the 10 percent of schools with the highest proportion of students from low socio-economic communities, whereas decile 10 schools are the 10 percent of schools with the lowest proportion of these students.