dhis2-devs team mailing list archive

[Lars Helge Øverland <larshelge@xxxxxxxxx>]

Hi there,

Calle is right here - we do average, then calculate std dev and set the
upper and lower bounds for each value.

We use data from ALL available time periods to calculate this (period org
unit, data element, option combo)

Mind you we should not really debate whether to use standard deviations or
not, rather if we should support additional _distributions_ to better
handle different kinds of data. We currently use the normal distribution
<http://en.wikipedia.org/wiki/Normal_distribution>.

Rodolfo - supporting min-max in the Web API is a good idea to allow for
third-party tools - feel free to write a blueprint.

regards,

Lars