Measures

You can think of a measure as a kind of attribute, but instead of describing a single case, it describes the collection as a whole, such as median height, maximum income, or proportion of females. Typically, you use it to compute something from the values of the attributes. An example is shown here. A collection consists of two dice with an attribute face. A measure, SumFaces, has been defined to give the total of the faces.

To build a sampling distribution of a statistic, you first define that statistic as a measure, which you then collect. See Define a Measure, Collect Measures and Other Results, and Create Simulations.