I’ve been looking at Statistics in my free time and what exactly does standard deviation is useful for and/or how can I extract meaningful data by using SD and what conclusion can I derive from said data?
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It’s simply a measure of how close sample values are to their mean. If all sample values are the same, the standard deviation would be zero. If they’re all close to the mean, the SD will be small. If the values are widely spread the SD will be correspondingly large.
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