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In English, the phrase rule of thumb refers to an approximate method for doing something, based on practical experience rather than theory. [1] [2] [3] This usage of the phrase can be traced back to the 17th century and has been associated with various trades where quantities were measured by comparison to the width or length of a thumb.
In aviation, the rule of three or "3:1 rule of descent" is a rule of thumb that 3 nautical miles (5.6 km) of travel should be allowed for every 1,000 feet (300 m) of descent. [ 1 ] [ 2 ] For example, a descent from flight level 350 would require approximately 35x3=105 nautical miles.
Rule of three (computer programming), a rule of thumb about code refactoring; Rule of three (hematology), a rule of thumb to check if blood count results are correct; Rule of three (mathematics), a method in arithmetic; Rule of three (medicinal chemistry), a rule of thumb for lead-like compounds; Rule of three (statistics), for calculating a ...
A popular rule of thumb is that most people can pull out about 4% each year as a safe starting withdrawal rate. Recent research by Morningstar veers a bit more conservatively and suggests the ...
Here’s a look at what Orman says are the financial rules everyone should follow. Live Below Your Means Spending less than you make is one financial rule of thumb everyone needs to follow, Orman ...
As a rule of thumb, she added, the lower your DTI, the greater the car payments you should be able to afford relative to your income. That said, a great place to be is if you have a sub-35% debt ...
The rule of thirds is a rule of thumb for composing visual art such as designs, films, paintings, and photographs. [3] The guideline proposes that an image should be imagined as divided into nine equal parts by two equally spaced horizontal lines and two equally spaced vertical lines, and that important compositional elements should be placed ...
Gigerenzer & Gaissmaier (2011) state that sub-sets of strategy include heuristics, regression analysis, and Bayesian inference. [14]A heuristic is a strategy that ignores part of the information, with the goal of making decisions more quickly, frugally, and/or accurately than more complex methods (Gigerenzer and Gaissmaier [2011], p. 454; see also Todd et al. [2012], p. 7).