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  2. Median (geometry) - Wikipedia

    en.wikipedia.org/wiki/Median_(geometry)

    In geometry, a median of a triangle is a line segment joining a vertex to the midpoint of the opposite side, thus bisecting that side. Every triangle has exactly three medians, one from each vertex, and they all intersect at the triangle's centroid. In the case of isosceles and equilateral triangles, a median bisects any angle at a vertex whose ...

  3. Geometric median - Wikipedia

    en.wikipedia.org/wiki/Geometric_median

    Definition. [] Formally, for a given set of m points with each , the geometric median is defined as the sum of the L2 distances minimizer. Here, arg min means the value of the argument which minimizes the sum. In this case, it is the point in n -dimensional Euclidean space from where the sum of all Euclidean distances to the 's is minimum.

  4. Median - Wikipedia

    en.wikipedia.org/wiki/Median

    Median. Finding the median in sets of data with an odd and even number of values. The median of a set of numbers is the value separating the higher half from the lower half of a data sample, a population, or a probability distribution. For a data set, it may be thought of as the “middle" value.

  5. Triangle - Wikipedia

    en.wikipedia.org/wiki/Triangle

    A triangle is a polygon with three corners and three sides, one of the basic shapes in geometry. The corners, also called vertices, are zero- dimensional points while the sides connecting them, also called edges, are one-dimensional line segments. A triangle has three internal angles, each one bounded by a pair of adjacent edges; the sum of ...

  6. Fréchet mean - Wikipedia

    en.wikipedia.org/wiki/Fréchet_mean

    Fréchet mean. In mathematics and statistics, the Fréchet mean is a generalization of centroids to metric spaces, giving a single representative point or central tendency for a cluster of points. It is named after Maurice Fréchet. Karcher mean is the renaming of the Riemannian Center of Mass construction developed by Karsten Grove and Hermann ...

  7. Central tendency - Wikipedia

    en.wikipedia.org/wiki/Central_tendency

    Central tendency. Appearance. For the graph/network concept, see Centrality. In statistics, a central tendency (or measure of central tendency) is a central or typical value for a probability distribution. [ 1 ] Colloquially, measures of central tendency are often called averages. The term central tendency dates from the late 1920s.

  8. Mode (statistics) - Wikipedia

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

    Mode (statistics) In statistics, the mode is the value that appears most often in a set of data values. [1] If X is a discrete random variable, the mode is the value x at which the probability mass function takes its maximum value (i.e., x=argmaxxi P (X = xi)). In other words, it is the value that is most likely to be sampled.

  9. Medial triangle - Wikipedia

    en.wikipedia.org/wiki/Medial_triangle

    In Euclidean geometry, the medial triangle or midpoint triangle of a triangle ABC is the triangle with vertices at the midpoints of the triangle's sides AB, AC, BC. It is the n = 3 case of the midpoint polygon of a polygon with n sides. The medial triangle is not the same thing as the median triangle, which is the triangle whose sides have the ...

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