A three sigma limit is a statistical calculation that refers to data within three standard deviations from a mean. It shows how much variation exists from an average.

Variance is a measurement of the spread between numbers in a data set. Investors use the variance equation to evaluate a portfolio’s asset allocation.

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A general decision-making rule in animal collectives. (A) Decision making between two sites when n x and n y animals have already chosen sites x and y, respectively.(B) The probability of choosing x ...

A volatility-based indicator that uses normal distribution on 4-hour returns to define dynamic bias zones. It plots upper and lower ±1σ zones around the 4H open price to highlight probable price bias ...