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  2. Serial sevens - Wikipedia

    en.wikipedia.org/wiki/Serial_sevens

    Serial sevens (or, more generally, the descending subtraction task; DST), where a patient counts down from one hundred by sevens, is a clinical test used to test cognition; for example, to help assess mental status after possible head injury, in suspected cases of dementia or to show sleep inertia. This well-known test, in active documented use ...

  3. Covariance and correlation - Wikipedia

    en.wikipedia.org/wiki/Covariance_and_correlation

    where E is the expected value operator. Notably, correlation is dimensionless while covariance is in units obtained by multiplying the units of the two variables. If Y always takes on the same values as X, we have the covariance of a variable with itself (i.e. ), which is called the variance and is more commonly denoted as the square of the ...

  4. Martingale difference sequence - Wikipedia

    en.wikipedia.org/wiki/Martingale_difference_sequence

    In probability theory, a martingale difference sequence (MDS) is related to the concept of the martingale. A stochastic series X is an MDS if its expectation with respect to the past is zero. Formally, consider an adapted sequence on a probability space . is an MDS if it satisfies the following two conditions: E [ X t | F t − 1 ] = 0 , a .

  5. Infinite difference method - Wikipedia

    en.wikipedia.org/wiki/Infinite_difference_method

    In mathematics, infinite difference methods are numerical methods for solving differential equations by approximating them with difference equations, in which infinite differences approximate the derivatives. In calculus there are two sections, one is differentiation and the other is integration. Integration is the reverse process of ...

  6. The no-mess sunscreen applicator that's a parent's must-have ...

    www.aol.com/lifestyle/solar-buddies-sunscreen...

    Solar Buddies is an empty applicator that you can fill up with the sunscreen of your choice. Use the reusable and replaceable sponge to apply the sunscreen easily and mess-free.

  7. Ben Affleck "Didn't Get a Heads-Up" About J.Lo Interview ...

    www.aol.com/ben-affleck-didnt-heads-j-113200786.html

    Wondering how Ben Affleck felt about J.Lo's interview about their divorce? Apparently he didn't get a heads-up and thinks she'll be talking about their split forever.

  8. Wall St choppy as uncertainty surrounds U.S. election - AOL

    www.aol.com/futures-gain-us-polls-fed-115051014.html

    Investors were largely pricing in a Fed interest rate cut of 25 bps at its policy announcement on Thursday, with CME's FedWatch Tool showing markets pricing in a 98% chance of a cut, with only a 2 ...

  9. Median test - Wikipedia

    en.wikipedia.org/wiki/Median_test

    Median test (also Mood’s median-test, Westenberg-Mood median test or Brown-Mood median test) is a special case of Pearson's chi-squared test. It is a nonparametric test that tests the null hypothesis that the medians of the populations from which two or more samples are drawn are identical. The data in each sample are assigned to two groups ...

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