Question

By Melhods of primary data
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Answer 1

Explanation:

There are a number of different survey techniques that can be used to collect primary data, such as interviews (e.g., face-to-face, telephone, e-mail, fax) or self-administered questionnaires. When polls, censuses, and other direct data collection are undertaken, these all constitute primary data sources

Answer 2

Answer:

Primary data can be collected in a number of ways. However, the most common techniques are self-administered surveys, interviews, field observation, and experiments. ... This can be contrasted with the term primary data source, which refers specifically to the firsthand collection of data for a particular purpose