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  2. Two-second rule - Wikipedia

    en.wikipedia.org/wiki/Two-second_rule

    The two-second rule is a rule of thumb by which a driver may maintain a safe trailing distance at any speed. [1] [2] The rule is that a driver should ideally stay at least two seconds behind any vehicle that is directly in front of his or her vehicle. It is intended for automobiles, although its general principle applies to other types of vehicles.

  3. Rule of thumb - Wikipedia

    en.wikipedia.org/wiki/Rule_of_thumb

    Cartoon by James Gillray satirizing Sir Francis Buller, 1782: "Judge Thumb; or, Patent Sticks for Family Correction: Warranted Lawful!". A modern folk etymology [14] relates the phrase to domestic violence via an alleged rule under English common law which permitted wife-beating provided that the implement used was a rod or stick no thicker than a man's thumb. [6]

  4. Queuing Rule of Thumb - Wikipedia

    en.wikipedia.org/wiki/Queuing_Rule_of_Thumb

    The Queuing Rule of Thumb (QROT) is a mathematical formula known as the queuing constraint equation when it is used to find an approximation of servers required to service a queue. The formula is written as an inequality relating the number of servers ( s ), total number of service requestors ( N ), service time ( r ), and the maximum time to ...

  5. Category:Rules of thumb - Wikipedia

    en.wikipedia.org/wiki/Category:Rules_of_thumb

    Category: Rules of thumb. 11 languages. ... This category has the following 2 subcategories, out of 2 total. A. Adages (124 P) B. Biological rules (1 C, 16 P)

  6. 68–95–99.7 rule - Wikipedia

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

    In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean, respectively.

  7. This Popular Rule of Thumb May Not Work for Your Retirement - AOL

    www.aol.com/finance/popular-rule-thumb-may-not...

    The 4% rule tells you to remove 4% of your retirement plan balance your first year of retirement, and then adjust future withdrawals based on inflation. So with a $1 million IRA or 401(k), you'd ...

  8. 5 ways to tell if you’re on track for retirement — and 5 ...

    www.aol.com/finance/5-ways-tell-track-retirement...

    1. Use the Rule of 25 to get a ballpark number. A good rule of thumb to estimate your retirement savings goal is the Rule of 25.Simply multiply your desired annual retirement income by 25.

  9. Miller twist rule - Wikipedia

    en.wikipedia.org/wiki/Miller_twist_rule

    The rule of thumb that Greenhill devised based upon his formula is actually what is seen in most writing, including Wikipedia. The rule of thumb is: The rule of thumb is: T w i s t = C D 2 L × S G 10.9 {\displaystyle Twist={\frac {CD^{2}}{L}}\times {\sqrt {\frac {SG}{10.9}}}}