Area Sample

Area Sample

In statistics, all the possible values a random variable can take under a given set of circumstances in a geographic area, as well as the probability that it will take each value. That is, an area sample divides a large geographic area into subunits and calculates the probability that the variable will occur in each unit. An area sample is a form of probability distribution applied to geography. It is also called an area selection.
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References in periodicals archive ?
This procedure was performed by two pathologists and all area sample was evaluated in 10X and 40X magnification.
Just over half of the respondents were female in the national sample (51.4%; n = 541), California sample (54.9%; n = 289), Chesapeake Bay area sample (58%; n = 332), and Florida sample (54.3%; n = 285).
Historically, a new area sample had been selected and implemented after each decennial census.
Study area Sample collection: This study was approved from the departmental ethical review committee of Hazara University Mansehra before starting the experimental work.
The Portland Study Area sample included 538 home sales: 152 treatment sales (HVTL abutting) and 386 control sales (non-HVTL abutting) located in three Portland metro-area counties--Washington County and Clackamas County in Oregon and Clark County in Washington.
When the three smallest size samples (1 [cm.sup.2], 10 [cm.sup.2] and 100 [cm.sup.2]) are removed from the analysis because they appear to be statistical outliers (Milliken & Johnson, 1992) and a one-way ANOVA is performed between the emergences in the 1,000 [cm.sup.2] and 2,000 [cm.sup.2] area samples there is no significant difference between the two area sample values (F=1.63, P=0.4794).
Comparison of PbTx concentration obtained from area samples taken with high-volume samplers showed that the personal samples indicated a lower exposure concentration (on the average about 50%) from those obtained from the area sample.
In general, personal sample fibre concentrations were greater than area sample fibre concentrations.
The small area sample consists of those elements of the sample from the whole population that belong to the considered subpopulation.
The Sales and Bargains Report (212-982-9300)--best known as the S&B Report--is a subscription-based, New York area sample sale newsletter ($49 a year).