ANNEX IISupplementary provisions
ANNEX II Precision requirements 1. Precision requirements for all data sets are expressed in standard errors and are defined as continuous functions of the actual estimates and of the size of the statistical population in a country. 2. The estimated standard error of a particular estimate shall not be bigger than the following amount: 3. The function f(N) shall have the form of . 4. The following values for parameters N , a and b shall be used: N a b Percentage of population severely limited in usual activities because of health problems (age 15 years or over) Country population aged 15 years or over residing in private households, in million persons and rounded to 3 decimal digits 1 200 2 800