Samples
Samples define the sets of property transaction records that are used to train models.
Samples contain sales prices (the dependent variable) and predictors.
A sample is defined by:
Its geography: a county, a region (with or without neighbors), a state, or the contiguous U.S.
The parcel type of the transacted properties (e.g., vacant or mostly vacant, urban or rural).
The type of sale, reflecting our confidence that the sales price reveals market value.