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Researching Target Markets: Difference between revisions
→Later weeks: definition of w:coefficient of variation
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== Later weeks == | == Later weeks == | ||
In [[w:statistics|statistics]] and [[w:probability theory|probability theory]], the '''[[w:standard deviation|standard deviation]]''' ('''SD''') (represented by the Greek letter sigma, '''[[w:Sigma|σ]]''') shows how much variation or [[w:tatistical dispersion|dispersion]] from the average exists. | *In [[w:statistics|statistics]] and [[w:probability theory|probability theory]], the '''[[w:standard deviation|standard deviation]]''' ('''SD''') (represented by the Greek letter sigma, '''[[w:Sigma|σ]]''') shows how much variation or [[w:tatistical dispersion|dispersion]] from the average exists. | ||
::A low standard deviation indicates that the data points tend to be very close to the [[w:mean|mean]] (also called expected value); a high standard deviation indicates that the data points are spread out over a large range of values. ( Wikipedia ) | :::A low standard deviation indicates that the data points tend to be very close to the [[w:mean|mean]] (also called expected value); a high standard deviation indicates that the data points are spread out over a large range of values. ( Wikipedia ) | ||
* The '''[[w:coefficient of variation|coefficient of variation]]''' ('''CV''') is a [[w:normalization (statistics)|normalized]] measure of [[w:statistical dispersion|dispersion]] of a [[w:probability distribution|probability distribution]] or [[w:frequency distribution|frequency distribution]]. ( Wikipedia ) | |||