sample standard deviation
- noun
- Specialized
:
desviación estándar de la muestra
- For the six women in the sample who were third wives, we get values of 14, 14, 10, 10, 4, and 2 years since the marriage of the second wife, a mean of 7.30 with a sample standard deviation of 4.61.
Examples
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With monthly data it could be the sample standard deviation of the returns over the month, and with yearly it would be the sample over over the year.
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Using price series of more than a century in length, Pindyck (1999) has shown that the average growth rates of the real prices of oil, coal, and natural gas have been quite stable (and close to zero) over periods of 20 to 40 years, as have the sample standard deviations of log price changes.
Academic text (2001) -
I can plot my sample standard deviation and I could have another data point here and another data point here.
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So X bars are sample mean, Looks OK S is our sample standard deviation Looks OK Sample size is all right.
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The test statistic for the difference between CAARs is based on a Welch's t-test and the sample standard deviations of each portfolio's abnormal returns.
Academic text (2018) -
In order to estimate the population standard deviation, we calculated the sample standard deviation from our survey data.
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The sample standard deviation of the test scores provides insight into the variability of the students' performance.
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To assess the reliability of our findings, we used the sample standard deviation of the collected measurements.
Synonyms
8
4.7
A number that shows how much values in a set vary from the average
Surface Forms
Morphology
The phrase is compositionally formed: 'sample' modifies 'standard deviation', so a learner can infer it refers to the standard deviation computed from a sample rather than a whole population. However, 'standard deviation' is a technical statistical concept whose precise meaning (a measure of spread/average distance from the mean and its calculation) is not fully predictable from everyday senses of 'standard' and 'deviation', so some domain knowledge is needed.
Etymology
Sample standard deviation comes from the idea of measuring how much a small sample differs so you can 'estimate' the whole group. Imagine tasting a few spoonfuls of soup: the differences between those spoonfuls give the standard deviation, and we make a small correction so that number better guesses 'how spread out' the whole pot is.