The confusion between accuracy and precision is one of my personal hot-buttons. As an example of the problem...

A guy is measuring things (doesn't really matter what) and only has tools to measure to a tenth of an increment (1.2). He starts talking about 80% of this quantity, and insists that it is exactly .96 (1.2 x .8), without realizing that this is stupid, as he can't measure to this degree of precision, where describing it as "between .9 and 1.0" makes sense and is accurate.

Another example;
A guy with a watch that is only marked 1 through 12 without hashmarks for minutes can be on time every time for appointments because his watch is accurate, gains or loses only a couple of seconds a day, and reflects the time on Naval Observatory's atomic clock, but without precision. The guy with the display down to seconds is always late because his watch loses two minutes a day, or possess greater precision by two orders of magnitude without being accurate.

But words like "about" and ending in "-ish" disturb the harmony of the Type A personalities that call the shots, so they demand a precise and wrong number rather than a less precise but accurate number.

And this is why I argued that CAS3 should include a block on statistics (and got told to sit down and shut up).