10.19.09

10.19.09 - Monday, October 19, 2009 1) Positive Aspects of...

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Monday, October 19, 2009 1) Positive Aspects of Simple Random Sampling a) eliminates/controls for bias b) saves time, money, and arch resources c) easily implemented (pulling numbers out of a hat) d) gathered data may be analyzed statistically (precision and reliability) e) doesn’t require any prior knowledge/assumptions about an area 2) Negative Aspects a) Luck of the draw may produce uneven coverage b) Takes no advantage of what we might already know about an area 3) Stratified Random Sampling a) Stratifying the population and sampling within each individual subpopulation b) Controls for heterogeneity by breaking population into subpopulations c) Strata chosen based on research interests (e.g. vegetation, soil type, topography, ethnographic knowledge) 4) Procedure a) Divide population into strata b) Select simple random sample within each stratum 5) Systematic Interval Sampling a) Eliminates potential of uneven coverage b) First sample unit chosen randomly, then other units are chosen at a fixed interval from the
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This note was uploaded on 05/24/2010 for the course ANT 3 taught by Professor Staff during the Fall '08 term at UC Davis.

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10.19.09 - Monday, October 19, 2009 1) Positive Aspects of...

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