**Business / Taxes / Standard Deviation:** Standard deviation is a statistical measurement of how far a variable quantity, such as the price of a stock, moves above or below its average value. The wider the range, which means the greater the standard deviation, the riskier an investment is considered to be. Some analysts use standard deviation to predict how a particular investment or portfolio will perform. They calculate the range of the investment's possible future performances based on a history of past performance, and then estimate the probability of meeting each performance level within that range.

**Standard Noun Synonyms**: criterion, measure, benchmark, model, pattern, archetype, touchstone, yardstick, gauge, guide, guideline, paradigm, paragon, exemplar, example, sample, type, ideal, beau id‚al, rule, canon, law, requirement, precept, principle

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Science / Chemistry / Relative Standard Deviation: The relative standard deviation is a measure of precision, calculated by dividing the standard deviation for a series of measurements by the average measurement. MORE

Business / Finance / Standardized Value: A normal distribution with a mean of 0 and a standard deviation of 1. MORE

Business / Finance / Standard Error: The square root of the variance. A measure of dispersion of a set of data from its mean. MORE