Chemistry, asked by sundramsahu21, 5 hours ago

द्वितीयक आँकड़े क्या है? इनके संग्रह की कोई 3 विधियां/स्त्रोत की व्याख्या कीजिए।​

Answers

Answered by pranav160180
0

Answer:

When the investigator himself does not make any investigation and rather uses the data which has been collected by by some other researcher such data is known as secondary data. The sources of collecting secondary data are:

(i) published sources like newspapers, articles, blogs etc.  

(ii) unpublished sources like unpublished news, etc.

their sources are books , published sources , journal and etc

Explanation:

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