King County Department of Assessments

Setting values, serving the community, and promoting fairness and equity.

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Glossary of terms for residential parcels

SAMPLE
	A set of observations selected from a population.
SALES WARNINGS
	Sales verification information that identifies something out of the ordinary on a sale.
STANDARD DEVIATION
	The statistic calculated from a set of numbers by subtracting the mean from each value and squaring the remainders, adding together all the squares, dividing by the size of the sample less one, and taking the square root of the result. When the data are normally distributed, one can calculate the percentage of observations within any number of standard deviations from normal probability tables. When the data are not normally distributed, the standard deviation is less meaningful, and one should proceed cautiously.
STANDARDS OF PRACTICE
	The standards of practice adopted by the department and governing real property appraisal activities by accredited appraisers are the generally accepted appraisal standards as evidenced by the current appraisal standards promulgated by the Appraisal Standards Board of the Appraisal Foundation. A complete text of these appraisal standards is available for viewing during normal working hours at the property tax division of the department (WAC 458-10-060).
SUB AREA
	A smaller appraisal market in a geographical area. To limit your search to a sub area, you will need to know a parcel number that is in the geographical area of interest.
SUPPLY
	The amount of a good or service that would be offered for sale at various prices during a given period.