List out the sources of official and non official surveys
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Answer:
Official statistics are statistics published by government agencies or other public bodies such as international organizations as a public good. They provide quantitative or qualitative information on all major areas of citizens' lives, such as economic and social development,[1] living conditions,[2] health,[3]education,[4] and the environment.[5]
During the 15th and 16th centuries, statistics were a method for counting and listing populations and State resources. The term statistics comes from the New Latinstatisticum collegium (council of state) and refers to science of the state.[6] According to the Organisation for Economic Co-operation and Development, official statistics are statistics disseminated by the national statistical system, excepting those that are explicitly not to be official".[7]