Universe (askiaanalyse and askiavista)

A universe defines the reference base for your calculations. In other words, it defines the individuals taken into account in the total.

Note: for numeric questions, the universe is calculated as follows:

If the numeric values come from a closed question, then the universe will be calculated in the same way as it is in closed questions. Asking for the mean will not change the base (DK responses are always included).
If the numeric data is continuous (open-ended), then the base for selected response (which is meaningless for a free numeric) is the same as the question base ( in other words, the intervals or fixed values you might create do not change the base).

Example

Our sample size is 150 people, including 76 men and 74 women. We ask "What is your favorite color?" to 100 people, and obtain the following result:

Imagine that we want to calculate the percentages, we will obtain the following table for the universe, with the following Universe types:

Use selected responses

This means that only the selected individuals will be taken into account in the total base, or 70 people. Note that in this instance, the response item "Blue" has been de-selected.

Use the question base

Even if we have only selected the "Green" and "Red" answer categories: we ask for the calculations to be made on the base of people to whom we have asked the question, or 100 people. Note that in this instance, the response item "Blue" has been de-selected.

Use answering base

This means that the calculations will be made on the base of individuals who have given an answer to the question (excluding the system Non Answers) , or 100-10= 90 people.

Use selected sub-population

This means that the calculations will be made on the base of the 76 men who have given an answer.

All interviews

This means that the calculations will be made on the base of the whole sample or 150 people.

When a question is in a preliminary loop or in a filtered question table, the base for a developed question is the number of interviews that included that loop item, rather than all interviews. In AskiaAnalyse, the following universes are available for use in this situation:
- Question table base
- All interviews for question table

Favorite color	Men: 76	Women: 74	Sample: 150
Green	20	10	30 people
Red	15	25	40 people
Blue	10	10	20 people
Don't Know	6	4	10 people
Not asked	25	25	50 people

Base: 70	Counts	Percentage
Green	30	42.9%
Red	40	57.1%
Total	70	100%

Base: 100	Counts	Percentage
Green	30	30%
Red	40	40%
Total	100	100%

Base: 90	Counts	Percentage
Green	30	33.3%
Red	40	44.4%
Blue	20	22.2%
Total	90	100%