Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Somer G. Anderson is CPA, doctor of ...

This example computes three core statistics from an array (a), namely the average (AV), standard deviation (SD), and coefficient of variation (CV). Results are derived step by step and returned in ...

Abstract: Aiming at the loss of color information within existing curve matching methods, which happens on transformation from an RGB color image into gray space and results in mismatches, we present ...

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In response to my article, Is the Stock Market Too Concentrated?, which relied upon standard-deviation calculations to assess investment risk, a reader wrote: “My problem [with your argument] is ...

Standard normal distribution, bell curve, with percentages Standard normal distribution, with the percentages for three standard deviations of the mean. Sometimes informally called bell curve. Used in ...

Standard deviation is a measure used in statistics to understand how spread out or dispersed a set of values is from their average or mean. It helps us grasp the variability within a dataset, showing ...

Two commonly used measures of risk in investment portfolios are portfolio beta and standard deviation. In this article, we will explore the differences between portfolio beta vs standard deviation, ...