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A SAMPLE DESIGN FOR INVESTIGATING THE EFFECTS OF STREAM POLLUTION ON WATER BASED RECREATION EXPENDITURES 1
Author(s) -
Long Wesley H.
Publication year - 1968
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1968.tb05760.x
Subject(s) - recreation , streams , sample (material) , pollution , sample size determination , sampling (signal processing) , cluster analysis , environmental science , sampling design , stratification (seeds) , statistics , regression , stratified sampling , regression analysis , econometrics , data collection , hydrology (agriculture) , computer science , mathematics , engineering , ecology , population , chemistry , sociology , biology , germination , chromatography , computer vision , seed dormancy , botany , demography , geotechnical engineering , dormancy , filter (signal processing) , computer network
This paper presents a sample design for selecting streams in an investigation of the relation between water pollutian and water based recreation expenditures. The design is a proportional sample of clusters of streams stratified in a two‐way scheme. The clustering is achieved by sampling 71/2 minute topographical maps, and the stratification by using measures connected with water pollution to classify the clusters. The design is based on considerations of economy in data collection and computational efficiency. A distinctive feature of the design is that data collected are to be used in a regression analysis. Thus, the sample size is determined by trying to achieve a given degree of precision for the regression coefficients.