5 ms·
NB: Post author here. Std deviation definitely helps a lot, still often not as good as percentiles, was actually thinking about adding some of that in the post
by djk447 5y ago
NB: Post author here.
Std deviation definitely helps a lot, still often not as good as percentiles, was actually thinking about adding some of that in the post but it was already getting so long. It's funny how things you think are simple sometimes take the most effort to explain, definitely found that on this one.
- waynecochran 5y agoYeah -- std deviation has a similar problem to the mean in that it doesn't give you a full picture unless the distribution is close to normal / gaussian.
- esyir 5y agoPretty much why summary statistics often give the IQR, which gives some idea to the skew and shape of the distribution as well. Unfortunately, BD and marketing just want a single number to show that the value is bigger and hate anything more complicated than a barchart.
- varelaz 5y agoBarchart is basically your percentiles (just more of them) so why not show it? Bars and whiskers could be more complicated for them but still the same sort of data
- djk447 5y agoNB: Post author here. We've been meaning to add IQR as an accessor function for these, may have to go back and do it...the frequency trails [1] stuff from Brendan Gregg also goes into some of this and it's really cool as a visualization. [1]: https://www.brendangregg.com/FrequencyTrails/mean.html https://www.brendangregg.com/FrequencyTrails/mean.html