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standard deviation

NOUN
  1. the square root of the variance

How To Use standard deviation In A Sentence

  • That notion identifies heritability with the regression of the offspring phenotype on the parental (or biparental mean in the case of sexual reproduction), where both phenotypes are presented as z-scores (i.e., set to mean = 0 and standard deviation = 1). Miss Winter Solstice
  • The top selling non-fiction book Blink is coining mucho bling for Malcolm Gladwell, yet in 1997 Gladwell wrote a New Yorker article called "The Sports Taboo: Why blacks are like boys and whites are like girls," which made exactly the same argument as Larry Summers made about what is innately different in the capabilities of males and females -- that men have a larger standard deviation on many traits, so there are more men at the top and bottom of the bell curves. Archive 2005-02-27
  • Often, that level of probability is arbitrarily set to a value like 95%, or two standard deviations, two sigma, which is about 98% for a normal distribution. Archive 2007-10-01
  • The margin for continuous variables is defined as a one standard deviation increase from the weighted mean.
  • There is a kurtosis measure, a fourth moment as standard deviation is a second moment, for this variation. A Dark, Misleading Force
  • Values are means of triplicate measures and error bars represent the standard deviations.
  • Paralleling this, I observe significant reductions in implicit bias (0.20 to 0.57 standard deviations) among Hindu children. Matthew Yglesias » Neighborhood Diversity
  • The maximum likelihood estimators(MLE) of means and standard deviations and the asymptotic distribution of likelihood ratio statistic are given.
  • One study that identified 25% of women had a bone mineral density more than 2 standard deviations below normals.
  • The conventional formula for the Sharpe ratio is: (Rp/Rf)/(SDp), where Rp=expected portfolio return, Rf=risk free return (10-year Treasury), and SD=standard deviation of the portfolio. The Volokh Conspiracy » The Nobel Prize in Economics
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