List any two types of surveys that are practiced in today's world(excluding those mentioned in your text book).What can historians derive from such surveys ?
Clue:
A survey can be done for any product/service, living/non living thing with a purpose of better understanding of the object and to fulfil the requirements. Eg. after doing surveys latest trend of automobiles are trending in the market to reduce fuel consumption, emission ect.
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In today's world surveys are very important to introduce any kind of product in market. For example, a car company first takes the survey to get information about choice of people about features of cars then prepare its car according to peoples choices. Government find out about the young people in school by the age mentioned in documents.
Historian can derive the information about ratio of young and older people at particular period of time.
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