Idea 3of 22Builds onData in words or in numbers
Collect it yourself, or look it up
Where can data come from?
Today you'll discover
- data you collect yourself
- data someone else collected
- how to tell which is which
Think firstSix places data could come from
A Statistics Canada table: did we collect it, or did someone else?
Decide first, then press Next. For each card ask: who did the asking, counting or measuring?
Six cards in a pile and two columns: primary, we collect it; and secondary, someone else did. We survey our class, we count cars at the corner and we time our paper planes move into primary. A Statistics Canada table, a chart in a library book and a weather website's records move into secondary. The last step asks about Ontario's population found online.
See the whole ideathe big idea and the key word, in one place
The big idea
Primary data you collect yourself; secondary data someone else collected, and you use it.
Compare themPrimary: it fits your question exactly, but it takes time to collect. Secondary: it is quick to find, but it may not ask exactly what you want.
Easy to get wrongReading data yourself does not make it primary. What matters is who did the collecting.
Key words
- primary data
- data you collect yourself, by asking, counting or measuring
- secondary data
- data someone else collected, that you find in a table, chart, book or website
Ready to use it?
- Say whether data is primary or secondary.