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  2. List of EIA standards - Wikipedia

    en.wikipedia.org/wiki/List_of_EIA_standards

    Signal standard for non-broadcast high resolution monochrome video. EIA-343A Formerly RS-343 A. Video signal standard for high resolution monochrome CCTV. Based on EIA-343. EIA-364-38 TP-38D Cable Pull-Out Test Procedure for Electrical Connectors. EIA-370-B Designation System for Semiconductor Devices.

  3. E/A ratio - Wikipedia

    en.wikipedia.org/wiki/E/A_ratio

    E/A ratio. The E/A ratio is a marker of the function of the left ventricle of the heart. It represents the ratio of peak velocity blood flow from left ventricular relaxation in early diastole (the E wave) to peak velocity flow in late diastole caused by atrial contraction (the A wave). [1] It is calculated using Doppler echocardiography, an ...

  4. The IRS will soon set its new 2025 tax brackets. Here's what ...

    www.aol.com/irs-soon-set-2025-tax-184950231.html

    Adjusting the nation's tax brackets for inflation helps individuals avoid so-called "bracket creep," or when workers are pushed into higher tax bands due to the impact of cost-of-living ...

  5. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    v. t. e. In the United States, academic grading commonly takes on the form of five, six or seven letter grades. Traditionally, the grades are A+, A, A−, B+, B, B−, C+, C, C−, D+, D, D− and F, with A+ being the highest and F being lowest. In some cases, grades can also be numerical. Numeric-to-letter-grade conversions generally vary from ...

  6. Phase I environmental site assessment - Wikipedia

    en.wikipedia.org/wiki/Phase_I_environmental_site...

    The most recent standard is "Standards and Practices for All Appropriate Inquiries" 40 Code of Federal Regulations, Section 312 [1] which drew heavily from ASTM E1527-13, which is the ASTM Standard for conducting 'All Appropriate Inquiry' (AAI) for the environmental assessment of a real property. Previous guidances regarding the ASTM E1527 ...

  7. Standard deviation - Wikipedia

    en.wikipedia.org/wiki/Standard_deviation

    A large standard deviation indicates that the data points can spread far from the mean and a small standard deviation indicates that they are clustered closely around the mean. For example, each of the three populations {0, 0, 14, 14}, {0, 6, 8, 14} and {6, 6, 8, 8} has a mean of 7. Their standard deviations are 7, 5, and 1, respectively.

  8. Standard error - Wikipedia

    en.wikipedia.org/wiki/Standard_error

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  9. List of guitar tunings - Wikipedia

    en.wikipedia.org/wiki/List_of_guitar_tunings

    Standard – E-A-d-g-b The standard tuning, without the top E string attached. Alternative variants are easy from this tuning, but because several chords inherently omit the lowest string, it may leave some chords relatively thin or incomplete with the top string missing (the D chord, for instance, must be fretted 5-4-3-2-3 to include F#, the ...