s becomes a much more statistically efficient estimator for σ. When the subgroup size is increased, the likelihood of encountering an extreme value increases, so that s, which is less affected than R by extreme values in th 当小群大小是10或更多时,几乎总是使用s,因为,当小群大小增加, s成为...
1982. A new distribution-free quantile estimator. Biometrika 69: 635–640. 0 .2 .4 .6 .8 1 fraction of the data Domestic Foreign 26 Letter values Often we do not really need all the quantiles, especially if the sample size is large. We could just use the letter values, which are ...
Community-weighted leaf nitrogen concentrations were used as a proxy for site fertility. These were calculated for each plot using database of species trait values (S.J.R. and D.A.P., unpublished data) in combination with height tier (0–30 cm; >30 cm–2 m; >2–5 m; >5–12 m; ...
Hence, we confine ourselves in this article to compare the model-robust moment estimation methods with different values of the power p with the DBIC estimator. 4. Computation of Standard Errors In this section, the computation of the variance matrix of parameter estimates θ from model-robust ...