easy · FRM Part 1 Quantitative Analysis
What is the primary difference between the standard deviation of a population (σ) and the standard error of the mean (SE)?
- The standard deviation measures individual dispersion, while the standard error measures the precision of the mean estimate.
- Standard deviation is always numerically smaller than the standard error, regardless of the sample size chosen.
- The standard error applies strictly to entire populations, while standard deviation applies only to smaller samples drawn from them.
- There is essentially no meaningful difference between the two; both terms are simply synonymous labels used for statistical risk.
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