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Math Help - list of all symbols used in statistics

  1. #1
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    list of all symbols used in statistics

    hello

    is there a list of all symbols used in statistics that explains them, for example the ^ under a letter, etc

    also, is there a symbol like turned clockwise for 90 degrees?

    thanks
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  2. #2
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    Where are you getting these symbols from, that they aren't explaining what they mean. The "^" is usually called a "hat" and refers to a proportion (as opposed to a population). Not sure what your clockwise-symbol is. Some context would help.
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  3. #3
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    Quote Originally Posted by ANDS! View Post
    Where are you getting these symbols from, that they aren't explaining what they mean. The "^" is usually called a "hat" and refers to a proportion (as opposed to a population). Not sure what your clockwise-symbol is. Some context would help.
    thanks for your reply

    can you tell me please what does the ^ over β symbol represents here:
    Linear regression - Wikipedia, the free encyclopedia

    and here:
    Regression analysis - Wikipedia, the free encyclopedia

    thanks
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  4. #4
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    Quote Originally Posted by mathos View Post
    thanks for your reply

    can you tell me please what does the ^ over β symbol represents here:
    Linear regression - Wikipedia, the free encyclopedia

    and here:
    Regression analysis - Wikipedia, the free encyclopedia

    thanks
    That is a "hat" and refers to a proportion parameter (as opposed to a population parameter. . .or statistic I guess). It's called beta-hat, or p-hat, or delta-hat, to distinguish from the population version.
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  5. #5
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    Quote Originally Posted by ANDS! View Post
    That is a "hat" and refers to a proportion parameter (as opposed to a population parameter. . .or statistic I guess). It's called beta-hat, or p-hat, or delta-hat, to distinguish from the population version.
    thanks but in the second link, it says:

    "Given a random sample from the population, we estimate the population parameters"

    so does the hat also mean "estimation" ?
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  6. #6
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    Quote Originally Posted by mathos View Post
    thanks but in the second link, it says:

    "Given a random sample from the population, we estimate the population parameters"

    so does the hat also mean "estimation" ?
    It do. Sometimes (by proving it algebraically) they are one and the same. And sometimes they are not. To prevent confusion and to make sure folks know what they are talking about, that little hat is placed above the value.
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