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Data from the World Resources Institute includes: percentage tree-cover, population density and tree cover, share of wood in fuel consumption, etc. SoilGrids1km - soil property and class maps SoilGrids1km is a collection of updatable soil property and class maps of the world at a resolution of 1 km produced using state-of-the-art model-based ...
In statistics, quality assurance, and survey methodology, sampling is the selection of a subset or a statistical sample (termed sample for short) of individuals from within a statistical population to estimate characteristics of the whole population. The subset is meant to reflect the whole population, and statisticians attempt to collect ...
If the results are similar between various studies, the data is said to be homogeneous, and the tendency is for these data to be more conclusive. The heterogeneity is indicated by the I 2 . A heterogeneity of less than 50% is termed low, and indicates a greater degree of similarity between study data than an I 2 value above 50%, which indicates ...
Data quality assurance; Data set; Data-snooping bias; Data stream clustering; Data transformation (statistics) Data visualization; DataDetective – software; Dataplot – software; Davies–Bouldin index; Davis distribution; De Finetti's game; De Finetti's theorem; DeFries–Fulker regression; de Moivre's law; De Moivre–Laplace theorem ...
Volume can be calculated from the metrics recorded in a plot sample. For example, if a tree was measured to be 20m tall and with a DBH of 19 cm using previous measured tree data a volume could be approximated according to species. Such a table has been constructed by Josef Pollanschütz [5] in Austria. Volume of tree = BA X h x f pollanschutz
This works by partitioning the data set into equal-sized buckets and aggregating the data within each bucket. This pre-aggregated data set becomes the new sample data over which to draw samples with replacement. This method is similar to the Block Bootstrap, but the motivations and definitions of the blocks are very different.
Social statistics data (3 C, 30 P) ... World Values Survey This page was last ... Statistical data sets. 23 languages ...
As most tree based algorithms use linear splits, using an ensemble of a set of trees works better than using a single tree on data that has nonlinear properties (i.e. most real world distributions). Working well with non-linear data is a huge advantage because other data mining techniques such as single decision trees do not handle this as well.