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  2. Cronbach's alpha - Wikipedia

    en.wikipedia.org/wiki/Cronbach's_alpha

    Cronbach's alpha (Cronbach's ), also known as tau-equivalent reliability or coefficient alpha (coefficient ), is a reliability coefficient and a measure of the internal consistency of tests and measures. [1] [2] [3] It was named after the American psychologist Lee Cronbach.

  3. Internal consistency - Wikipedia

    en.wikipedia.org/wiki/Internal_consistency

    Internal consistency is usually measured with Cronbach's alpha, a statistic calculated from the pairwise correlations between items. Internal consistency ranges between negative infinity and one. Coefficient alpha will be negative whenever there is greater within-subject variability than between-subject variability.

  4. Kuder–Richardson formulas - Wikipedia

    en.wikipedia.org/wiki/Kuder–Richardson_formulas

    It is a special case of Cronbach's α, computed for dichotomous scores. [2] [3] It is often claimed that a high KR-20 coefficient (e.g., > 0.90) indicates a homogeneous test. However, like Cronbach's α, homogeneity (that is, unidimensionality) is actually an assumption, not a conclusion, of reliability coefficients.

  5. List of logic symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_logic_symbols

    In logic, a set of symbols is commonly used to express logical representation. The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics.

  6. Lindsey Vonn to race super-G at skiing worlds despite feeling ...

    www.aol.com/lindsey-vonn-race-super-g-085608836.html

    SAALBACH-HINTERGLEMM, Austria (AP) — Lindsey Vonn completed pre-race inspection and was planning on competing in the super-G at the Alpine skiing world championships on Thursday despite feeling ...

  7. AI-Powered ‘Death Clock’ Will Predict When You Will ... - AOL

    www.aol.com/ai-powered-death-clock-predict...

    An AI-powered death clock is getting an influx of use after claiming to predict the method and age at which you will die. Death Clock says it utilizes AI to analyze age, weight, sex, smoking and ...

  8. Walmart Broccoli Recall Updated to ‘Deadly’ Risk

    www.aol.com/walmart-broccoli-recall-updated...

    Earlier this month, broccoli was recalled from Walmart due to possible listeria contamination. On January 27, the U.S. Food and Drug Administration (FDA) updated the recall classification to Class ...

  9. Charles D. Powell - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/charles-d-powell

    From January 2008 to December 2012, if you bought shares in companies when Charles D. Powell joined the board, and sold them when he left, you would have a 23.5 percent return on your investment, compared to a -2.8 percent return from the S&P 500.