Static measurements univariate

Static measurements univariate

1. Measures of dispersion

   • Verify representativeness from an average in a data set
   • Variance
     • It is the arithmetic mean of the difference squares, between the values ​​taken by the variable and its arithmetic mean
       • ungrouped data
       • grouped data
   • Standard deviation
     • It is the square root of the variance
   • Co-efficient of Variation
     • Comparison
       • Relative
       • Percentage
   • Typical or Standardized Score
     • Measures the deviation of a observation regarding to the arithmetic mean in deviation typical units
   • Co-efficient of Mean Deviation
     • average of the deviations from to the arithmetic mean
       • ungrouped data
       • grouped data
   • Co-efficient of Median Deviation
     • Mean of the absolute values ​​of the differences between the values ​​taken by the variable and its median
       • ungrouped data
       • grouped data

2. Measures of Trend Central

   • * Description of a set of observations and determine the position of a value with respect to a data set
   • Position
     • Central route
       • Arithmetic mean of the extreme values
     • Cuartiles
     • Deciles
     • Percentiles
     • They determine a position within the set of values
   • average
     • arithmetic mean
       • Represents or summarizes the characteristics of a Set of values
         • ungrouped data
         • grouped data
     • Harmonic mean
       • applies to the variable in rate form or average speed
     • Geometric mean
       • It applies when the sample presents a growth geometric
         • ungrouped data
         • grouped data
     • Cuadratic mean
       • It is an average that involves the squares of the quantities averaged
         • ungrouped data
         • grouped data
     • Cubic mean
       • Cubic root of arithmetic mean of the cubes of the variable values
         • ungrouped data
         • grouped data
   • Trend
     • Mode
       • Value of the variable that is most repeated
     • Median
       • value that exceeds half of the variables and is surpassed by half of these
         • Ungrouped data: They are ordered from smallest to largest and takes the value of half, in If you have two values, add and divide in two
         • grouped data

3. Estimators or statisticians (SAMPLE)

4. Parameters (POPULATION)

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