SAMPLE SIZES FOR POINT, DOUBLE SAMPLING

被引:16
作者
ODERWALD, RG [1 ]
JONES, E [1 ]
机构
[1] MICHIGAN TECHNOL UNIV,SCH FORESTRY & WOOD PROD,HOUGHTON,MI 49931
来源
CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE | 1992年 / 22卷 / 07期
关键词
D O I
10.1139/x92-131
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Formulas are derived for determining the total number of sample points and the number of volume points or a point, double sample with a ratio of means estimator to replace a point sample and achieve the same variance. A minimum ratio of the cost of measuring volume to the cost of measuring basal area at a point is determined for which the point, double sample will be less costly, in terms of time required to measure points, than the point sample.
引用
收藏
页码:980 / 983
页数:4
相关论文
共 4 条
[1]  
FREESE F, 1962, USDA AGR HDB, V232
[2]  
Husch B, 1982, FOREST MENSURATION
[3]  
JONES EA, 1982, THESIS VIRGINIA POLY
[4]  
Sukhatme P. V., 1970, SAMPLING THEORY SURV