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Variance

(Last edited: Tuesday, 14 March 2017, 8:55 AM)
  • Measure of variation shown by a set of observations
  • Sum of the squares of deviations from the mean divided by the number of observations minus 1 (because it is a sample)
  • s^2=( \sum\nolimits_{i=1}^n (x_i- \mu)^2)/(n-1)
  • Example:

Set of numbers: 3,4,5,5,5,6,7

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