# nonprobability sample

__n__a sample of which the sampling units have not been selected in a manner that satisfies the minimum requirements for probability sampling.**DISCUSSION**— No meaningful statistical inference can be made with data obtained from a nonprobability sample. No meaningful statement can be made concerning the precision, standard error, or bias of the sample.

*ASTM D121-09a Standard Terminology of Coal and Coke.
2014.*

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**nonprobability sample**— a sample in which not every element of the population has an equal chance of being selected, so that the sample is not representative and generalizations cannot be made to the entire population … Medical dictionary**Nonprobability sampling**— Sampling is the use of a subset of the population to represent the whole population. Probability sampling, or random sampling, is a sampling technique in which the probability of getting any particular sample may be calculated. Nonprobability… … Wikipedia**Sample (statistics)**— In statistics, a sample is a subset of a population. Typically, the population is very large, making a census or a complete enumeration of all the values in the population impractical or impossible. The sample represents a subset of manageable… … Wikipedia**convenience sample**— a type of nonprobability sample in which the population selected is easily accessible to the researcher; available subjects are simply entered into the study without any attempt at randomization. Called also accidental s … Medical dictionary**purposive sample**— a type of nonprobability sample in which the researcher consciously selects specific elements or subjects for inclusion in order to ensure inclusion of certain characteristics relevant to the study … Medical dictionary**Simple random sample**— In statistics, a simple random sample is a subset of individuals (a sample) chosen from a larger set (a population). Each individual is chosen randomly and entirely by chance, such that each individual has the same probability of being chosen at… … Wikipedia**statistics**— /steuh tis tiks/, n. 1. (used with a sing. v.) the science that deals with the collection, classification, analysis, and interpretation of numerical facts or data, and that, by use of mathematical theories of probability, imposes order and… … Universalium**Evidence-Based Nursing**— or EBN is a method of identifying solid research findings and implementing them in nursing practices to further increase the quality of patient care. Overview Evidenced based nursing/evidence based practice (EBN/EBP) is a nursing process that… … Wikipedia**Statistical survey**— Statistical surveys are used to collect quantitative information about items in a population. Surveys of human populations and institutions are common in political polling and government, health, social science and marketing research. A survey… … Wikipedia**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