Chapter 12: Statistics

Five examples from day-to-day life are

1. The number of students in our class
2. The number of fans in our school
3. Electricity bills of our house for the last two years
4. Election results obtained from television or newspapers
5. Literacy rate figures obtained from Educational Survey

Primary data: When the information was collected by the investigator themselves with a definite objective in their mind, the data obtained is called primary data.

Primary data; (i), (ii) and (iii)

Secondary data: When the information was gathered from a source which already had the information stored, the data obtained is called secondary data.

Secondary data; (iv) and (v)