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  2. Renaissance Technologies - Wikipedia

    en.wikipedia.org/wiki/Renaissance_Technologies

    Renaissance Technologies LLC, also known as RenTech [4] or RenTec, [5] is an American hedge fund based in East Setauket, New York, [6] on Long Island, which specializes in systematic trading using quantitative models derived from mathematical and statistical analysis. Their signature Medallion fund is famed for the best record in investing history.

  3. Quantedge - Wikipedia

    en.wikipedia.org/wiki/Quantedge

    Quantedge employs a systematic investment strategy that uses statistical models to invest across major macro asset classes such as bonds, equities, commodities, currencies and reinsurance. The fund has an investment universe of more than 200 instruments and typically invests in more than 90% of these instruments.

  4. Standard deviation - Wikipedia

    en.wikipedia.org/wiki/Standard_deviation

    The standard deviation σ of X is defined as which can be shown to equal. Using words, the standard deviation is the square root of the variance of X . The standard deviation of a probability distribution is the same as that of a random variable having that distribution. Not all random variables have a standard deviation.

  5. List of Marvel Cinematic Universe films - Wikipedia

    en.wikipedia.org/wiki/List_of_Marvel_Cinematic...

    Box office performance of Marvel Cinematic Universe films; Film U.S. release date Box office gross All-time ranking Budget Ref(s) U.S. and Canada Other territories Worldwide U.S. and Canada Worldwide; Phase One; Iron Man: May 2, 2008: $319,034,126 $266,762,121 $585,796,247 89 190 $140 million The Incredible Hulk: June 13, 2008: $134,806,913 ...

  6. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    The top grade, A, is given here for performance that exceeds the mean by more than 1.5 standard deviations, a B for performance between 0.5 and 1.5 standard deviations above the mean, and so on. Regardless of the absolute performance of the students, the best score in the group receives a top grade and the worst score receives a failing grade.

  7. ChatGPT - Wikipedia

    en.wikipedia.org/wiki/ChatGPT

    ChatGPT is a chatbot developed by OpenAI and launched on November 30, 2022. Based on large language models (LLMs), it enables users to refine and steer a conversation towards a desired length, format, style, level of detail, and language. Successive user prompts and replies are considered at each conversation stage as context.