standard deviation
8
4.7
- noun
- /ˈstændərd ˌdɛviˈeɪʃən/
- Specialized
:
desviación estándar
- In statistics, the standard deviation is a key value that indicates how spread out the numbers are in a dataset.
We can compute means and standard deviations and that's fine.
- We can compute means and standard deviations and that's fine.
- You put that into the model and you solve for standard deviation, which is one of the black Shoals inputs.
- The the the little bump is couple of standard deviations perhaps, but it is in the same place in both experiments.
- And so that ends up being where you'll have that margin of error, that standard deviation bar on the chart be a bit wider.
- I just said Yale's portfolio had a high return and I didn't correct for standard deviation of return.
- Even a half a standard deviation would be world shaking because there are many social problems.
- It's about half a standard deviation difference and it shows up pretty early in, in childhood.
- It was just the standard deviation here plays a part.
- You know, by definition, it does not conform to a standard deviation.
Examples
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So given a mean and a standard deviation, we have a curve.
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In addition, means and standard deviations were calculated for each of the resulting factors.
Academic text (2011) -
So can anyone tell me why we use standard deviation in finance as a measure of risk?
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Then we have the standard deviations of the returns on the three assets.
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On average, there is a difference of about one standard deviation between the two populations.
Academic text (1990) -
Table 1 presents the means and standard deviations for subjects' use of each technique.
Academic text (1999) -
The subtests have a mean scale score of 10 and a standard deviation of 3.
Academic text (1999) -
For the industrial sector, a change of one standard deviation from the historical trend was emulated.
Academic text (1999) -
Each critical value represents a discrepancy approximately two standard deviations beyond the population mean.
Academic text (1990) -
So the formula for the standard deviation was the square root of NPQ.
Synonyms
A number that shows how spread out values in a sample are
How Spread Out
Surface Forms
Morphology
The compound 'standard deviation' transparently signals a notion of how much something departs from a standard or norm, so a learner who knows 'standard' and 'deviation' can guess it relates to variation from a typical value. However, the precise statistical sense (a specific numeric measure tied to the mean and the square root of variance) is technical and not fully predictable from the constituents alone, making the expression only partially inferable.
Etymology
Standard deviation comes from a simple picture: imagine a line that shows the average and numbers as people standing near or far from that line. The word deviation shows how far they move away from the standard, meaning the 'average', so the term tells you how much the data 'deviate' from that 'standard'.