The following is from material presented by WMATA at the 4/2/2012 AAC (Accessibility Advisory Committee) meeting (Board Memo dated March 23, 2012).
The challenge of showing this piece of slight of hand is a bit like the illusion of sawing a person (usually female) in two (Chris Angel did multiple pieces but he IS an over achiever).
So… rather than static pictures: today’s offering has movement and sound:
( for cell users: you tube)
So – to summarize:
- If you chop data up in small enough bits you can distort its information.
- If you don’t pay attention to SCALE you won’t notice that categories have been divided unequally.
Excluding the base and cap fares, categories are as diverse as a single price point (like $6.30) all the way to a band $2.10 wide ($3.05-$5.15).
Comparison across unscaled groups where the grouping HAS NO MEANING is worthless and, worse, misleading
- If you don’t think critically you will miss the impact of your decisions.
I’ll have more entertainment tomorrow…….