A test of spatial independence
作者:
A. J. Baczkowski,
K. V. Mardia,
期刊:
Journal of Applied Statistics
(Taylor Available online 1989)
卷期:
Volume 16,
issue 3
页码: 385-389
ISSN:0266-4763
年代: 1989
DOI:10.1080/02664768900000047
出版商: Carfax Publishing Company
数据来源: Taylor
摘要:
Mardia (1980) proposed a bi-directional test of spatial independence based upon the sample variogram which has a X2-distribution under the null hypothesis. We give here a modified test whichleads to improvement to the X2-distribution approximation to the size. We introduce some other tests including a four-directional extension, and analogous tests based on the sample correlation coefficient. Their power is compared with the modified bi-directional test for a doubly geometric alternative, and this limited power study indicates that the modified bi-directional test is more powerful.
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