Standard Deviation Hard

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Standard deviation of repeated measurements quantifies:

RankGuru · Accepted Answer

The **Standard Deviation** ($\sigma$) is a statistical measure of the dispersion or 'spread' of data around the mean.
- In physics experiments, it estimates the magnitude of **random errors**.
- Usually, a result is reported as $\bar{x} \pm \sigma$, where $\sigma$ indicates the uncertainty interval.

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Standard Deviation Hard

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