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  2. Indicator function - Wikipedia

    en.wikipedia.org/wiki/Indicator_function

    In many cases, such as order theory, the inverse of the indicator function may be defined. This is commonly called the generalized Möbius function, as a generalization of the inverse of the indicator function in elementary number theory, the Möbius function. (See paragraph below about the use of the inverse in classical recursion theory.)

  3. Indicator (statistics) - Wikipedia

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

    In statistics and research design, an indicator is an observed value of a variable, or in other words "a sign of a presence or absence of the concept being studied". [1] Just like each color indicates in a traffic lights the change in the movement.

  4. Plus–minus sign - Wikipedia

    en.wikipedia.org/wiki/Plus–minus_sign

    In mathematics, the ± sign generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction. In statistics and experimental sciences , the ± sign commonly indicates the confidence interval or uncertainty bounding a range of possible errors in a measurement, often the ...

  5. Dummy variable (statistics) - Wikipedia

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

    Indicator function – Mathematical function characterizing set membership; Linear discriminant function – Method used in statistics, pattern recognition, and other fields; Multicollinearity – Linear dependency situation in a regression model; One-hot – Bit-vector representation where only one bit can be set at a time

  6. Reference card - Wikipedia

    en.wikipedia.org/wiki/Reference_card

    Reference notes. A reference card or reference sheet (or quick reference card) or crib sheet is a concise bundling of condensed notes about a specific topic, such as mathematical formulas [1] to calculate area/volume, or common syntactic rules and idioms of a particular computer platform, application program, or formal language.

  7. Index (statistics) - Wikipedia

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

    In statistics and research design, an index is a composite statistic – a measure of changes in a representative group of individual data points, or in other words, a compound measure that aggregates multiple indicators. [1] [2] Indices – also known as indexes and composite indicators – summarize and rank specific observations. [2]

  8. See Ariana Grande watch ‘Wicked’ with her 99-year-old ...

    www.aol.com/see-ariana-grande-watch-wicked...

    Ariana Grande and her grandmother, Marjorie Grande, had a sweet time together watching her new movie "Wicked." On her Instagram story, Ariana Grande shared two photos of her and her 99-year-old ...

  9. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Mathematics has a remarkable ability to cross cultural boundaries and time periods. As a human activity, the practice of mathematics has a social side, which includes education, careers, recognition, popularization, and so on. In education, mathematics is a core part of the curriculum and forms an important element of the STEM academic disciplines.

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