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2. Significant figures - Wikipedia

   en.wikipedia.org/wiki/Significant_figures

   This is the method preferred by many scientific disciplines, because, for example, it avoids skewing the average value of a long list of values upwards. For an integer in rounding, replace the digits after the n digit with zeros. For example, if 1254 is rounded to 2 significant figures, then 5 and 4 are replaced to 0 so that it will be 1300.

3. Sigmoid function - Wikipedia

   en.wikipedia.org/wiki/Sigmoid_function

   In particular see "Chapter 4: Artificial Neural Networks" (in particular pp. 96–97) where Mitchell uses the word "logistic function" and the "sigmoid function" synonymously – this function he also calls the "squashing function" – and the sigmoid (aka logistic) function is used to compress the outputs of the "neurons" in multi-layer neural ...

4. SigFig - Wikipedia

   en.wikipedia.org/wiki/Sigfig

   Significant figures, the digits of a number that carry meaning contributing to its measurement resolution Topics referred to by the same term This disambiguation page lists articles associated with the title SigFig .

5. Normalization (statistics) - Wikipedia

   en.wikipedia.org/wiki/Normalization_(statistics)

   This can be generalized to restrict the range of values in the dataset between any arbitrary points and , using for example ′ = + (). Note that some other ratios, such as the variance-to-mean ratio ( σ 2 μ ) {\textstyle \left({\frac {\sigma ^{2}}{\mu }}\right)} , are also done for normalization, but are not nondimensional: the units do not ...

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7. Statistical significance - Wikipedia

   en.wikipedia.org/wiki/Statistical_significance

   When drawing data from a sample, this means that the rejection region comprises 5% of the sampling distribution. [39] These 5% can be allocated to one side of the sampling distribution, as in a one-tailed test , or partitioned to both sides of the distribution, as in a two-tailed test , with each tail (or rejection region) containing 2.5% of ...

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9. Sign (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Sign_(mathematics)

   In addition to the sign of a real number, the word sign is also used in various related ways throughout mathematics and other sciences: Words up to sign mean that, for a quantity q, it is known that either q = Q or q = −Q for certain Q. It is often expressed as q = ±Q. For real numbers, it means that only the absolute value |q| of the ...