Idea 1of 22
The question decides the data
How do you know which data to collect?
Today you'll discover
- how a question picks its data
- which facts help and which do not
- why a true fact can still be no use
Think firstHow do students get to school?
Which fact helps us find out how students get to school?
Decide first, then press Next. Read the question at the top, then each card.
The question “How do students get to school?” at the top, six cards in a pile under it, and two columns: helps answer it, and does not help. The cards move down into the columns: bus, walk, car or bike; how long the trip takes; how far away you live help. Favourite colour, shoe size and your pet's name do not. The last step asks about a snack question.
See the whole ideathe big idea and the key word, in one place
The big idea
The question of interest decides the data: collect only what helps answer it.
One question, its dataQuestion: which snack should we sell? Helps: favourite snack, the most you would pay, food allergies. Does not help: shoe size.
Easy to get wrongA fact can be true and still be no use. Shoe sizes are real data, but they cannot tell you how anyone gets to school.
Key word
- question of interest
- the question a survey or a count is trying to answer
Ready to use it?
- Choose the data that answers a question of interest.
- Spot a fact that does not help.