sample+error

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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 rate conversion — is the process of converting a (usually digital) signal from one sampling rate to another, while changing the information carried by the signal as little as possible. When applied to an image, this process is sometimes called image scaling.Sample …   Wikipedia

• Sample mean and sample covariance — are statistics computed from a collection of data, thought of as being random.ample mean and covarianceGiven a random sample extstyle mathbf{x} {1},ldots,mathbf{x} {N} from an extstyle n dimensional random variable extstyle mathbf{X} (i.e.,… …   Wikipedia

• Error diffusion — is a type of halftoning in which the quantization residual is distributed to neighboring pixels which have not yet been processed. Its main use is to convert a multi level image into a binary image, though it has other applications.Unlike many… …   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

• sample preparation — ▪ chemistry Introduction  in analytical chemistry (chemistry), the processes in which a representative piece of material is extracted from a larger amount and readied for analysis. Sampling and sample preparation have a unique meaning and special …   Universalium

• error — errorless, adj. errorlessly, adv. /er euhr/, n. 1. a deviation from accuracy or correctness; a mistake, as in action or speech: His speech contained several factual errors. 2. belief in something untrue; the holding of mistaken opinions. 3. the… …   Universalium

• Error code — In computer programming, error codes are enumerated messages that correspond to faults in a specific software application. They are typically used to identify faulty hardware, software, or incorrect user input in programming languages that lack… …   Wikipedia

• Sample and hold — In electronics, a sample and hold circuit is used to interface real world signals, by changing analogue signals to a subsequent system such as an analog to digital converter. The purpose of this circuit is to hold the analogue value steady for a… …   Wikipedia

• sample selection bias — Non random selection is both a source of bias in empirical research and a fundamental aspect of many social processes. When observations in social research are selected so that they are not independent of the outcome variables in a study, sample… …   Dictionary of sociology

• sample — 1) A small quantity of a commodity, etc. , selected to represent the bulk of a quantity of goods. See sale by sample 2) A small quantity of a product, given to potential buyers to enable them to test its suitability for their purposes. 3) A group …   Big dictionary of business and management