Select issue
Silva Fennica 1926-1997
1990-1997
1980-1989
1970-1979
1960-1969
1950-1959
1940-1949
1926-1939
Acta Forestalia Fennica
1992-1999
1984-1991
1974-1983
1968-1973
1953-1968
1933-1952
1913-1932
Articles containing the keyword 'resampling estimators'
Category : Research article
article id 925,
category
Research article
(2013).
An assessment of three variance estimators for the k-nearest neighbour technique.
Silva Fennica
vol.
47
no.
1
article id 925.
https://doi.org/10.14214/sf.925
Keywords:
forest inventory;
simple random sampling;
resampling estimators;
bootstrap;
jackknife;
difference estimator;
cluster sampling
Abstract |
Full text in HTML
|
Full text in PDF |
Author Info
A jackknife (JK), a bootstrap (BOOT), and an empirical difference estimator (EDE) of totals and variance were assessed in simulated sampling from three artificial but realistic complex multivariate populations (N = 8000 elements) organized in clusters of four elements. Intra-cluster correlations of the target variables (Y) varied from 0.03 to 0.26. Time-saving implementations of JK and BOOT are detailed. In simple random sampling (SRS), bias in totals was ≤ 0.4% for the two largest sample sizes (n = 200, 300), but slightly larger for n = 50, and 100. In cluster sampling (CLU) bias was typically 0.1% higher and more variable. The lowest overall bias was in EDE. In both SRS and CLU, JK estimates of standard error were slightly (3%) too high, while the bootstrap estimates in both SRS and CLU were too low (8%). Estimates of error suggested a trend in EDE toward an overestimation with increasing sample size. Calculated 95% confidence intervals achieved a coverage that in most cases was fairly close (± 2%) to the nominal level. For estimation of a population total the EDE estimator appears to be slightly better than the JK estimator.
-
Magnussen,
Canadian Forest Service, Natural Resources Canada, 505 West Burnside Road, Victoria BC V8Z 1M5 Canada
E-mail:
steen.magnussen@nrcan.gc.ca
Click this link to register to Silva Fennica.
If you are a registered user, log in to save your selected articles for later access.
Your selected articles
Send to email
Send to email
Pukkala T.,
Holt Hanssen K.
et al.
(2019)
Stem taper and bark functions for Norway spruce ..
Silva Fennica
vol. 53
no. 3
article id 10187
(remove)
| Edit comment
Silva Fennica ·
Finnish Society of Forest Science
