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2. Döbereiner's triads - Wikipedia

   en.wikipedia.org/wiki/Döbereiner's_triads

   By 1829, Döbereiner had found other groups of three elements (hence "triads") whose physical properties were similarly related. [2] He also noted that some quantifiable properties of elements (e.g. atomic weight and density) in a triad followed a trend whereby the value of the middle element in the triad would be exactly or nearly predicted by taking the arithmetic mean of values for that ...

3. Arithmetic mean - Wikipedia

   en.wikipedia.org/wiki/Arithmetic_mean

   The arithmetic mean can be similarly defined for vectors in multiple dimensions, not only scalar values; this is often referred to as a centroid. More generally, because the arithmetic mean is a convex combination (meaning its coefficients sum to ), it can be defined on a convex space, not only a vector space.

4. Portal:Arithmetic - Wikipedia

   en.wikipedia.org/wiki/Portal:Arithmetic

   Download as PDF; Printable version; ... The weighted arithmetic mean is similar to an ordinary ... For example, the reciprocal of 5 is one fifth (1/5 or 0.2), and the ...

5. Mean - Wikipedia

   en.wikipedia.org/wiki/Mean

   The mean of a set of observations is the arithmetic average of the values; however, for skewed distributions, the mean is not necessarily the same as the middle value (median), or the most likely value (mode). For example, mean income is typically skewed upwards by a small number of people with very large incomes, so that the majority have an ...

6. QM-AM-GM-HM inequalities - Wikipedia

   en.wikipedia.org/wiki/QM-AM-GM-HM_Inequalities

   In mathematics, the QM-AM-GM-HM inequalities, also known as the mean inequality chain, state the relationship between the harmonic mean, geometric mean, arithmetic mean, and quadratic mean (also known as root mean square). Suppose that ,, …, are positive real numbers. Then

7. Category:Means - Wikipedia

   en.wikipedia.org/wiki/Category:Means

   Download QR code; Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; Wikidata item; Appearance. ... Weighted arithmetic mean;