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Sample Size   Sample Error     


Level of Confidence

95% 99%


Sample Error

+/- %


Total Population







Sample Size


Level of Confidence expresses the probability that the real value of an indicator to be within the confidence interval.

Sample Error (Confidence Interval) represents the range of values (the error) an indicator calculated on a sample can have.

Total Population (optional) represents total number of persons, households, companies etc. the sample needs to be representative for.

Sample Size represents the number of  questionnaires we need in order to have representative answers for total population.


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