The statistical hypothesis is called the null hypothesis and ... The hypothesis is fixed and the data (from the sample) are random, so the hypothesis is either true or it isn't true, it has no ...

PROC SURVEYSELECT provides a variety of methods for selecting probability-based random samples ... This property of probability sampling avoids selection bias and enables you to use statistical theory ...

If no other sources are available to measure certain variables of a target population, Statistics Netherlands often uses a random sample, i.e. a sample of units from the population drawn in accordance ...