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Standard deviation is a statistic that tells you how closely a group of numbers (for example, temperatures) are clustered around a mean value (average temperature). When the standard deviation is small, the numbers are fall close to the mean. When the standard deviation is large, the individual values are spread out far from the mean.When expressing the mean of a set of temperature values, it is helpful to give the standard deviation as well. If the mean temperature value has a large standard deviation associated with it, it probably means there were large fluctuations in the data. If, on the other hand, the standard deviation is small, the temperatures measured were probably fairly uniform.To calculate standard deviation, subtract the average value from each number in your set, and then square each of the differences. Sum up all of the squares and divide by the number of values in the set. Then take the square root.
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Fecha publicación: 12.5.2016
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