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Sample size determination or estimation is the act of choosing the number of observations or replicates 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 size used in a study is usually determined ...
Mathematically, the variance of the sampling mean distribution obtained is equal to the variance of the population divided by the sample size. This is because as the sample size increases, sample means cluster more closely around the population mean.
Jackknife resampling. In statistics, the jackknife (jackknife cross-validation) is a cross-validation technique and, therefore, a form of resampling. It is especially useful for bias and variance estimation. The jackknife pre-dates other common resampling methods such as the bootstrap. Given a sample of size , a jackknife estimator can be built ...
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The Kubelka-Munk theory, [1] [2] devised by Paul Kubelka [3] [4] and Franz Munk, is a fundamental approach to modelling the appearance of paint films. As published in 1931, the theory addresses "the question of how the color of a substrate is changed by the application of a coat of paint of specified composition and thickness, and especially the thickness of paint needed to obscure the substrate".
The painting was done on a thin exterior wall, so the effects of humidity were felt keenly, and the paint failed to properly adhere to it. Because of the method used, soon after the painting was completed on 9 February 1498 it began to deteriorate. [11] In 1499, Louis XII contemplated removing the painting from the wall and taking it to France ...
A Hegman gauge, sometimes referred to as a grind gauge, grind gage, or grindometer, is an instrument which indicates the fineness of grind or the presence of coarse particles and agglomeration in a dispersion. [1] It is commonly used to determine how finely ground the particles of pigment (or other solid) dispersed in a sample of paint (or ...
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