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  2. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    In the empirical sciences, the so-called three-sigma rule of thumb (or 3 σ rule) expresses a conventional heuristic that nearly all values are taken to lie within three standard deviations of the mean, and thus it is empirically useful to treat 99.7% probability as near certainty.

  3. Hyundai Sigma engine - Wikipedia

    en.wikipedia.org/wiki/Hyundai_Sigma_engine

    The G6AU and G6CU (both also called the 3.5 D ) are the large 3,497 cc (3.5 L; 213.4 cu in) versions of the Sigma engine. Bore and stroke are both larger at 93 mm × 85.8 mm (3.66 in × 3.38 in), respectively.

  4. Normal distribution - Wikipedia

    en.wikipedia.org/wiki/Normal_distribution

    3.2.1.2 Operations on two independent standard normal variables. ... This fact is known as the 68–95–99.7 (empirical) rule, or the 3-sigma rule.

  5. Ford Sigma engine - Wikipedia

    en.wikipedia.org/wiki/Ford_Sigma_engine

    The 1.7 L; 102.5 cu in (1,679 cc) engines uses a heavily modified 1.4 L engine block and features Variable Cam Timing on the inlet camshaft. This displacement has only been used in the Ford Puma . A 155 PS (114 kW; 153 hp) version of this engine was developed for the Ford Racing Puma with only 500 units built.

  6. 3-sigma - Wikipedia

    en.wikipedia.org/?title=3-sigma&redirect=no

    This page was last edited on 24 September 2024, at 05:21 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

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  8. Donald Trump mocked Canadian Prime Minister Justin Trudeau after his top minister’s surprise resignation following a clash on how to handle the president-elect’s looming tariffs.

  9. Sigma bond - Wikipedia

    en.wikipedia.org/wiki/Sigma_bond

    There is no more than 1 sigma bond between any two atoms. Molecules with rings have additional sigma bonds, such as benzene rings, which have 6 C−C sigma bonds within the ring for 6 carbon atoms. The anthracene molecule, C 14 H 10, has three rings so that the rule gives the number of sigma bonds as 24 + 31 = 26. In this case there are 16 ...