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The standard deviation σ of X is defined as which can be shown to equal. Using words, the standard deviation is the square root of the variance of X . The standard deviation of a probability distribution is the same as that of a random variable having that distribution. Not all random variables have a standard deviation.
The troy ounce of sterling silver was henceforth raised in price by 50% from 40 to 60 silver pennies (each penny weighing 8 grains sterling silver and containing 0.4795 g (0.01542 ozt) fine silver). The gold half-angel of 40 grains (2.578 g (0.0829 ozt) fine gold) was raised in price from 40 pence to 60 pence (5 shillings or 1 ⁄ 4 pound) and ...
Wake turbulence categories. Since 2020, there are four categories, based on maximum certificated take-off mass: [1] : 4-12 [2] Light (L) — aircraft types of 7,000 kg or less. Super (J) — aircraft types specified as such in ICAO Doc 8643, Aircraft Type Designators. As of 2023, the only aircraft in Category J is the Airbus A380, [3] with an ...
The American Israel Public Affairs Committee ( AIPAC / ˈeɪpæk / AY-pak) is a lobbying group that advocates pro- Israel policies to the legislative and executive branches of the United States. [4] One of several pro-Israel lobbying organizations in the United States, [5] AIPAC states that it has over 3 million members, [6] 17 regional offices ...
Fentanyl is a highly potent synthetic piperidine opioid primarily used as an analgesic. It is 20 to 40 times more potent than heroin and 100 times more potent than morphine; [8] its primary clinical utility is in pain management for cancer patients and those recovering from painful surgeries. [9] [10] Fentanyl is also used as a sedative. [11]
A 12% solution is widely used in waterworks for the chlorination of water, and a 15% solution is more commonly used for disinfection of waste water in treatment plants. Sodium hypochlorite can also be used for point-of-use disinfection of drinking water, [39] taking 0.2-2 mg of sodium hypochlorite per liter of water.
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