Age distribution in household survey data
Indicators in the field of education statistics, such as those defined in the education glossary of the UNESCO Institute for Statistics , are typically calculated for specific age groups. For example, the youth literacy rate is for the population age 15 to 24 years, the adult literacy rate for the population age 15 and over, and the net attendance rates for primary and secondary education are for the population of primary and secondary school age , respectively. The net intake rate is an example for an indicator that is calculated for a single year of age, the official start age of primary school. For a correct calculation of education indicators it is necessary to have precise age data. In the case of data collected with population censuses or household surveys this means that the ages recorded for each household member should be without error. However, census or survey data sometimes exhibit the phenomenon of age heaping, usually on ages ending in 0 and 5. Such heaping or di...