Statistics and Probability Dictionary
Select a term from the dropdown text box. The online statistics
glossary will display a definition, plus links to other
related web pages.
In survey sampling, different samples can be randomly selected from the same population; and
each sample can often produce a different
Some confidence intervals include the true population parameter; others do not.
A confidence level refers to the percentage of all possible samples
that can be expected to include the true population parameter. For example,
suppose all possible samples were selected from the same population, and a confidence
interval were computed for each sample. A 95% confidence level
implies that 95% of the confidence intervals would include the true population