Idea 12of 22Builds onMatch the graph to the question
Same data, two graphs, two answers
Why draw the same data in more than one way?
Today you'll discover
- what a double-bar graph hides
- what a stacked-bar graph hides
- how to justify a choice
Think firstFavourite sports, as a double-bar graph
Which sport did the most students pick, counting both grades?
Decide first, then press Next. Ask what the question needs: totals, or a comparison.
The favourite-sport data drawn as a double-bar graph, Soccer 9 and 6, Basketball 4 and 10, Hockey 7 and 5. Then the same numbers stacked, each sport one bar, with totals 15, 14 and 12 above. Then back to the double bars, with Basketball's 10 to 4 marked. The last step shows pizza votes as double bars.
See the whole ideathe big idea and the key word, in one place
The big idea
The same data can go in different graphs; choose the one that answers your question.
Justify a choice“I chose stacked bars because the question asks for totals, and each bar's top shows one.”
Compare themDouble bars: compare the two groups in each category. Stacked bars: compare the totals, and see each total's parts.
Key word
- justify
- give the reason for a choice, using what the data and the graph show
Ready to use it?
- Choose between double bars and stacked bars.
- Justify a choice of graph in one sentence.