Data is defined as a collection of numbers which give the required information. For example, marks scored by the students in a class, number of members in a family, number of books sold etc.
Data are of two types:
(i) Primary data: It is the data collected by the person directly for a specific purpose without referring any source. Primary data is collected through surveys, local sources etc.
(ii) Secondary data: It is the data collected through other sources like research organizations, financial institutions etc.
The original form of data is called raw data. But when the data is arranged in ascending or …
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