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  2. List of price index formulas - Wikipedia

    en.wikipedia.org/wiki/List_of_price_index_formulas

    The Marshall-Edgeworth index, credited to Marshall (1887) and Edgeworth (1925), [11] is a weighted relative of current period to base period sets of prices. This index uses the arithmetic average of the current and based period quantities for weighting. It is considered a pseudo-superlative formula and is symmetric. [12]

  3. Spreadsheet - Wikipedia

    en.wikipedia.org/wiki/Spreadsheet

    A value can be entered from the computer keyboard by directly typing into the cell itself. Alternatively, a value can be based on a formula (see below), which might perform a calculation, display the current date or time, or retrieve external data such as a stock quote or a database value. The Spreadsheet Value Rule

  4. Google Sheets - Wikipedia

    en.wikipedia.org/wiki/Google_Sheets

    Improvements based on DocVerse were announced and deployed in April 2010. [12] In June 2012, Google acquired Quickoffice , a freeware proprietary productivity suite for mobile devices. [ 13 ] In October 2012, Google Spreadsheets was renamed Google Sheets and a Google Chrome app was released that provided shortcuts to Sheets on Chrome's new tab ...

  5. Index-matching material - Wikipedia

    en.wikipedia.org/wiki/Index-matching_material

    Typical oils used have an index of refraction around 1.515. [2] An oil immersion objective is an objective lens specially designed to be used in this way. The index of the oil is typically chosen to match the index of the microscope lens glass, and of the cover slip. For more details, see the main article, oil immersion.

  6. Magic formula investing - Wikipedia

    en.wikipedia.org/wiki/Magic_formula_investing

    A 2024 study evaluates the formula for the U.S. market from 1963 to 2022 and compares it with the performance of the Piotroski F-Score, Acquirer’s Multiple, and Conservative Formula. The study finds that all four formulas generate significant raw and risk-adjusted returns, primarily by providing efficient exposure to well-established style ...

  7. Benjamin Graham formula - Wikipedia

    en.wikipedia.org/wiki/Benjamin_Graham_formula

    Graham later revised his formula based on the belief that the greatest contributing factor to stock values (and prices) over the past decade had been interest rates. In 1974, he restated it as follows: [4] The Graham formula proposes to calculate a company’s intrinsic value as:

  8. Spearman's rank correlation coefficient - Wikipedia

    en.wikipedia.org/wiki/Spearman's_rank_correlation...

    The second approach to approximating the Spearman's rank correlation coefficient from streaming data involves the use of Hermite series based estimators. [19] These estimators, based on Hermite polynomials, allow sequential estimation of the probability density function and cumulative distribution function in univariate and bivariate cases ...

  9. Simple commodity production - Wikipedia

    en.wikipedia.org/wiki/Simple_commodity_production

    Historically, the development of simple exchange of commodities could not exist without simple commodity production. Engels does not argue that the law of value disappears when commodity trade is regulated by production prices but rather that the law of value is transformed and modified. It is transformed, because the exchange of equivalent ...