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  2. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    The inaccuracy in Excel calculations is more complicated than errors due to a precision of 15 significant figures. Excel's storage of numbers in binary format also affects its accuracy. [3] To illustrate, the lower figure tabulates the simple addition 1 + x − 1 for several values of x. All the values of x begin at the 15 th decimal, so Excel ...

  3. x̅ and R chart - Wikipedia

    en.wikipedia.org/wiki/X̅_and_R_chart

    In statistical process control (SPC), the ¯ and R chart is a type of scheme, popularly known as control chart, used to monitor the mean and range of a normally distributed variables simultaneously, when samples are collected at regular intervals from a business or industrial process. [1]

  4. Shewhart individuals control chart - Wikipedia

    en.wikipedia.org/wiki/Shewhart_individuals...

    The moving ranges involved are serially correlated so runs or cycles can show up on the moving average chart that do not indicate real problems in the underlying process. [ 2 ] : 237 In some cases, it may be advisable to use the median of the moving range rather than its average, as when the calculated range data contains a few large values ...

  5. Social Security number - Wikipedia

    en.wikipedia.org/wiki/Social_Security_number

    It eliminated the geographical significance of the first three digits of the SSN (the area number), by ceasing to allocate specific numbers by state for assignment to individuals. It eliminated the significance of the highest group number assigned for each area number; the High Group List therefore is frozen in time and can be used for ...

  6. Social insurance number - Wikipedia

    en.wikipedia.org/wiki/Social_insurance_number

    Social Insurance Numbers that begin with the number "9" are issued to temporary residents who are not Canadian citizens or Canadian permanent residents (e.g., foreign students, individuals on work visas). Often, these individuals must have an employment authorization in order to work in Canada.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Nelson rules - Wikipedia

    en.wikipedia.org/wiki/Nelson_rules

    The Nelson rules were first published in the October 1984 issue of the Journal of Quality Technology in an article by Lloyd S Nelson. [2] The rules are applied to a control chart on which the magnitude of some variable is plotted against time. The rules are based on the mean value and the standard deviation of the samples.

  9. Projected COLA for 2025: September update — how it's ...

    www.aol.com/finance/social-security-cost-of...

    Source: Social Security Administration. The projected 2025 COLA for Social Security is 2.5%, according to an emailed September 11 TSCL press release, resulting in another drop.