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  2. Hurst exponent - Wikipedia

    en.wikipedia.org/wiki/Hurst_exponent

    A value in the range 0 – 0.5 indicates a time series with long-term switching between high and low values in adjacent pairs, meaning that a single high value will probably be followed by a low value and that the value after that will tend to be high, with this tendency to switch between high and low values lasting a long time into the future ...

  3. Index (economics) - Wikipedia

    en.wikipedia.org/wiki/Index_(economics)

    An index number is an economic data figure reflecting price or quantity compared with a standard or base value. [5] [6] The base usually equals 100 and the index number is usually expressed as 100 times the ratio to the base value. For example, if a commodity costs

  4. House price index - Wikipedia

    en.wikipedia.org/wiki/House_price_index

    The Case-Shiller index prices are measured monthly and track repeat sales of houses using a modified version of the weighted-repeat sales methodology proposed by Karl Case, Robert Shiller, and Allan Weiss. This means that, to a large extent, it can adjust for the quality of the homes sold, unlike simple averages.

  5. Secretary problem - Wikipedia

    en.wikipedia.org/wiki/Secretary_problem

    Graphs of probabilities of getting the best candidate (red circles) from n applications, and k/n (blue crosses) where k is the sample size. The secretary problem demonstrates a scenario involving optimal stopping theory [1] [2] that is studied extensively in the fields of applied probability, statistics, and decision theory.

  6. List of index fossils - Wikipedia

    en.wikipedia.org/wiki/List_of_index_fossils

    Index fossils must have a short vertical range, wide geographic distribution and rapid evolutionary trends. Another term, "zone fossil", is used when the fossil has all the characters stated above except wide geographical distribution; thus, they correlate the surrounding rock to a biozone rather than a specific time period.

  7. List of IBM products - Wikipedia

    en.wikipedia.org/wiki/List_of_IBM_products

    Products, services, and subsidiaries have been offered from International Business Machines (IBM) Corporation and its predecessor corporations since the 1890s. [1] This list comprises those offerings and is eclectic; it includes, for example, the AN/FSQ-7, which was not a product in the sense of offered for sale, but was a product in the sense of manufactured—produced by the labor of IBM.

  8. Index of Place Names - Wikipedia

    en.wikipedia.org/wiki/Index_of_Place_Names

    All place names are assigned to the appropriate administrative areas existing as at 31 December 2015. The Index gives some alternative names for places, as well as Welsh-language names where appropriate. The 2016 edition of the IPN is the first to also feature Scottish place names.

  9. IBM Personal Computer AT - Wikipedia

    en.wikipedia.org/wiki/IBM_Personal_Computer_AT

    Due to [citation needed] a US antitrust consent decree with IBM, the PC AT architecture was functionally an open design, and IBM's efforts to trademark the AT name largely failed. Many 286-based PCs were modeled after it and marketed as AT-compatible. The label also became a standard term in reference to PCs that used the same type of power ...