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  2. Criterion - Wikipedia

    en.wikipedia.org/wiki/Criterion

    Criteria air contaminants, air pollutants that cause smog, acid rain, and other health hazards; Criterion validity, in psychometrics, a measure of how well one variable or set of variables predicts an outcome; Criterion-referenced test, translates a test score into a statement about the behavior to be expected of a person

  3. Mutual information - Wikipedia

    en.wikipedia.org/wiki/Mutual_information

    where is the Kullback–Leibler divergence, and is the outer product distribution which assigns probability () to each (,).. Notice, as per property of the Kullback–Leibler divergence, that (;) is equal to zero precisely when the joint distribution coincides with the product of the marginals, i.e. when and are independent (and hence observing tells you nothing about ).

  4. Voting criteria - Wikipedia

    en.wikipedia.org/wiki/Voting_criteria

    Woodall's plurality criterion is a voting criterion for ranked voting. It is stated as follows: [ 70 ] [ 71 ] If the number of ballots ranking A as the first preference is greater than the number of ballots on which another candidate B is given any preference [other than last], then A's probability of winning must be no less than B's.

  5. Euler's criterion - Wikipedia

    en.wikipedia.org/wiki/Euler's_criterion

    Example 1: Finding primes for which a is a residue. Let a = 17. For which primes p is 17 a quadratic residue? We can test prime p's manually given the formula above. In one case, testing p = 3, we have 17 (3 − 1)/2 = 17 1 ≡ 2 ≡ −1 (mod 3), therefore 17 is not a quadratic residue modulo 3.

  6. Validity (statistics) - Wikipedia

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

    Criterion validity evidence involves the correlation between the test and a criterion variable (or variables) taken as representative of the construct. In other words, it compares the test with other measures or outcomes (the criteria) already held to be valid.

  7. Student's t-test - Wikipedia

    en.wikipedia.org/wiki/Student's_t-test

    The independent samples t-test is used when two separate sets of independent and identically distributed samples are obtained, and one variable from each of the two populations is compared. For example, suppose we are evaluating the effect of a medical treatment, and we enroll 100 subjects into our study, then randomly assign 50 subjects to the ...

  8. Independence (probability theory) - Wikipedia

    en.wikipedia.org/wiki/Independence_(probability...

    Independence is a fundamental notion in probability theory, as in statistics and the theory of stochastic processes.Two events are independent, statistically independent, or stochastically independent [1] if, informally speaking, the occurrence of one does not affect the probability of occurrence of the other or, equivalently, does not affect the odds.

  9. Dependent and independent variables - Wikipedia

    en.wikipedia.org/wiki/Dependent_and_independent...

    In mathematics, a function is a rule for taking an input (in the simplest case, a number or set of numbers) [5] and providing an output (which may also be a number). [5] A symbol that stands for an arbitrary input is called an independent variable, while a symbol that stands for an arbitrary output is called a dependent variable. [6]