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  2. Empiricism - Wikipedia

    en.wikipedia.org/wiki/Empiricism

    The combined three forms of reasoning serve as a primary conceptual foundation for the empirically based scientific method today. Peirce's approach "presupposes that (1) the objects of knowledge are real things, (2) the characters (properties) of real things do not depend on our perceptions of them, and (3) everyone who has sufficient ...

  3. Empirical research - Wikipedia

    en.wikipedia.org/wiki/Empirical_research

    Empirical evidence (the record of one's direct observations or experiences) can be analyzed quantitatively or qualitatively. Quantifying the evidence or making sense of it in qualitative form, a researcher can answer empirical questions, which should be clearly defined and answerable with the evidence collected (usually called data). Research ...

  4. A priori and a posteriori - Wikipedia

    en.wikipedia.org/wiki/A_priori_and_a_posteriori

    Both terms are primarily used as modifiers to the noun knowledge (e.g., a priori knowledge). A priori can be used to modify other nouns such as truth. Philosophers may use apriority, apriorist and aprioricity as nouns referring to the quality of being a priori. [2]

  5. Empirical formula - Wikipedia

    en.wikipedia.org/wiki/Empirical_formula

    Glucose (C 6 H 12 O 6), ribose (C 5 H 10 O 5), Acetic acid (C 2 H 4 O 2), and formaldehyde (CH 2 O) all have different molecular formulas but the same empirical formula: CH 2 O.This is the actual molecular formula for formaldehyde, but acetic acid has double the number of atoms, ribose has five times the number of atoms, and glucose has six times the number of atoms.

  6. Chemical formula - Wikipedia

    en.wikipedia.org/wiki/Chemical_formula

    The term empirical refers to the process of elemental analysis, a technique of analytical chemistry used to determine the relative percent composition of a pure chemical substance by element. For example, hexane has a molecular formula of C 6 H 14 , and (for one of its isomers, n-hexane) a structural formula CH 3 CH 2 CH 2 CH 2 CH 2 CH 3 ...

  7. Empirical evidence - Wikipedia

    en.wikipedia.org/wiki/Empirical_evidence

    Empirical evidence is evidence obtained through sense experience or experimental procedure. It is of central importance to the sciences and plays a role in various other fields, like epistemology and law. There is no general agreement on how the terms evidence and empirical are to be defined. Often different fields work with quite different ...

  8. Formula - Wikipedia

    en.wikipedia.org/wiki/Formula

    The plural of formula can be either formulas (from the most common English plural noun form) ... For example, the empirical formula of ethanol may be written C 2 H 6 ...

  9. Sample mean and covariance - Wikipedia

    en.wikipedia.org/wiki/Sample_mean_and_covariance

    The sample mean is the average of the values of a variable in a sample, which is the sum of those values divided by the number of values. Using mathematical notation, if a sample of N observations on variable X is taken from the population, the sample mean is: