I want to filter answers of a long-lasting survey for a specific period, e.g. evaluate just the answers of November 2011.
At present it's only possible to filter by answer id but you don't know the timestamp of the answers.

It would be nice to have a checkbox with the option to count only the percentage of the completed answers.

e.g.:
current status
choice a - 50 25%
choice b - 30 15%
choice c - 20 10%
not completed - 100 50%

more interesting
choice a - 50 50%
choice b - 30 30%
choice c - 20 20%
not completed - 100 --

When analyzing the answers sometimes you need to exclude the people that opted no to answer an optional question.

record start and end of survey completion in ' and ".

if that is registered one can measure survey completion time up to the average comlpetion time.

that we you can exclude survey speedsters from the results.

Per my forum thread of today...

http://www.limesurvey.org/en/support/forums/2-design-issues/35836-statistical-o utput-problems-ver-187#35991

I can not be alone in suggesting that part of the idea of a branching survey structure is to filter out responses for specficic sub-sets of responses.

If my first question asks whether people are left-handed, and question two is only geared to left-handed people, I want to present the statistics for question 2 based on the SUB-SET ONLY.

Response Q1: 10% of London is left-handed.
Subset Response Q2: 67% of left-handed people in London like pizza.

The NO ANSWER computation makes the presentation of data arduous since basically it will have to be exported to a worksheet application and the charts will have to be plotted manually.

FEATURE REQUEST: That stats/graphs take into consideration the sub-sets created by one or "n" branched questions.