Thursday, 15 February 2018

Quibans 81: Good graph, bad graph

Here are two data representations from the same Daily Telegraph article about shootings in schools in the USA.

Comments?





My thoughts are below.

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I like the first one.  This is very clear and shows when incidents occurred.  There seem to be several weeks where lots of incidents happened.
February was less incident-filled than January.  (NB this graph was published 15 Feb.)
There are some confusing things: Was 15 Jan a school-day?  There was an incident on a Saturday. What does 'incident' mean?  On the black-cross days - were there 2 incidents or more than that.

In the second graph things seem completely backwards!  Here a smaller bar means the mass-shootings were closer together, which doesn't seem obvious.  Is there a better way to show this? 
Does it matter that the groups of years are not the same size? 

Lots to talk about here!

Source: http://www.telegraph.co.uk/news/2018/02/15/americas-gun-crisis-will-never-end-liberals-learn-make-peace/ 

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