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Researching Target Markets: Difference between revisions
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* '''[[w:Quantile]]s''' are points taken at regular intervals from the [[w:cumulative distribution function|cumulative distribution function]] (CDF) of a [[w:random variable|random variable]]. | * '''[[w:Quantile]]s''' are points taken at regular intervals from the [[w:cumulative distribution function|cumulative distribution function]] (CDF) of a [[w:random variable|random variable]]. | ||
A '''[[w:percentile|percentile]]''' (or a centile) is a measure used in statistics indicating the value below which a given [[w:percentage|percentage]] of observations in a group of observations fall. ( Wikipedia ) | |||
*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. | ||