Position measurements

Position measurements

1. Purpose

   • It is summeed up in a single number position of the data distribution
   • Determine
     • Submit a set of data
   • Synthesize
     • Data

2. Meaning

   • Position measures are indicators statistics
     • It allows us to summarize the data into one, or divide its distribution in intervals of the same size

3. CHARACTERISTIC

   • They must be defined rigorously
     • Willing to various interpretations
   • They correspond to all the observations of the series, otherwise it would not be a distribution feature
   • Shoulld not have a character math too much indeterminate
   • They must be subsumable algebraic calculation
     • Quick
       • Easy

4. Types of measures position

   • DECILES
     • They are measures of position that divide the frequency distribution in ten equal parts, they range from number 1 to number 9 deciles are designated by the letters da
       • Calculations os deciles D1, D2, D3, D4........D9
         • Divide the distribution intro 100 parts in such a way that each of they will contain 10%
   • Quartiles
     • Positional measures that divide the frequency distribution
       • In four parts same
         • Designated with the sign Qa, Q1, Q2, and Q3, derermine the values corresponding to 25%, 50% and 75% of the data Q2 coincides with the median
           • How are the quartuless
             • a) We sort the data smallest to largest
             • b) We look for the place it occupies each quartile by expression
   • Percentiles
     • It is one of so-called measure of non-central position (quartiles, deciles, quintiles, percentiles, etc) can be described as a form of comparison of results which is why it is a widely used concept in fields such as statistics or data analysis fields.
       • The perccentile is a number from o to 100, which is related to the percentage but it is not the percentage itself
         • Divide the set by 100 equal parts
           • Divide the distribution intro 100 parts, each containing 1% of the observations

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