stratum+size

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• Sample size determination — is the act of choosing the number of observations to include in a statistical sample. The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample. In practice, the sample …   Wikipedia

• Sample size — The sample size of a statistical sample is the number of observations that constitute it. It is typically denoted n , a positive integer (natural number).Typically, all else being equal, a larger sample size leads to increased precision in… …   Wikipedia

• china — /chuy neuh/, n. 1. a translucent ceramic material, biscuit fired at a high temperature, its glaze fired at a low temperature. 2. any porcelain ware. 3. plates, cups, saucers, etc., collectively. 4. figurines made of porcelain or ceramic material …   Universalium

• China — /chuy neuh/, n. 1. People s Republic of, a country in E Asia. 1,221,591,778; 3,691,502 sq. mi. (9,560,990 sq. km). Cap.: Beijing. 2. Republic of. Also called Nationalist China. a republic consisting mainly of the island of Taiwan off the SE coast …   Universalium

• integument — /in teg yeuh meuhnt/, n. 1. a natural covering, as a skin, shell, or rind. 2. any covering, coating, enclosure, etc. [1605 15; < L integumentum a covering. See IN 2, TEGUMENT] Syn. 1. cortex, involucre, involucrum. * * * Covering of the body,… …   Universalium

• ECONOMIC HISTORY — This article is arranged according to the following outline: first temple period exile and restoration second temple period talmudic era muslim middle ages medieval christendom economic doctrines early modern period sephardim and ashkenazim… …   Encyclopedia of Judaism

• Sampling (statistics) — Sampling is that part of statistical practice concerned with the selection of individual observations intended to yield some knowledge about a population of concern, especially for the purposes of statistical inference. Each observation measures… …   Wikipedia

• Balanced repeated replication — is a statistical technique for estimating the sampling variability of a statistic obtained by stratified sampling. Outline of the technique # Select balanced half samples from the full sample. # Calculate the statistic of interest for each half… …   Wikipedia

• evolution — evolutional, adj. evolutionally, adv. /ev euh looh sheuhn/ or, esp. Brit., /ee veuh /, n. 1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane. 2. a product of such development; something… …   Universalium

• Stratified sampling — In statistics, stratified sampling is a method of sampling from a population.When sub populations vary considerably, it is advantageous to sample each subpopulation (stratum) independently. Stratification is the process of grouping members of the …   Wikipedia

• Human skin — Skin epidermis (A), dermis (B), and subcutis (C), showing a hair follicle (1), sweat gland (11) sebaceous gland (7) Latin cutis …   Wikipedia