POSITION MEASUREMENTS

POSITION MEASUREMENTS

1. A measure of location is a value that divides a data set into equal percentages used to rank the observations in a population or sample.

   • features
     • They allow you to divide a data set into equal percentages and are used to rank the observations in a population or sample. The most common measures of position are quartiles, deciles, and percentiles.
     • This is a number chosen to indicate the direction of the data set and is useful for interpreting the information as a percentage.
     • the types of measurements are:
       • deciles
         • is a measure of position that divides the frequency distribution into ten equal parts starting from the first to the ninth. Deciles are denoted by the letter Da
           • parameters
             • The location parameter has the function of determining the distribution along the line. their values ​​depend on the presence or absence of phenomena such as Asymmetry, non-normal data, coexistence of subpopulations Parameters can be more useful
               • The main position parameters are:
                 • Arimetic mean:
                   • this is the most used position parameter because it summarizes A set of data in a single value that provides the concept of location its entirety. center of gravity can also be considered distribution to move asymmetrically Average value; affected by the presence of unusual data, both As the sample size decreases, more
                 • Median
                   • is the value that leaves 50% of the data on each page unseen Affected by the presence of unusual data (assuming the same size performance). It is a proxy measure of the average, thus achieving Data and comparisons are useful, especially in them. small sample size.
                     • are classified
                       • non-central tendency
                       • and the central
                 • Mode
                   • it is the most repeated value in the distribution. Yes A distribution that pools multiple subgroups, we can When it comes to multimodal phenomena. Quartiles: leave 25% (C1), 50% (C2, median) and 75% (C3) on the left side of the distribution.
       • quartiles
         • is a location metric that divides the frequency distribution into four equal modes. denoted by the symbol Qa
       • porcentiles
         • These measurements are primarily used to determine the values ​​in a data set that lie in a frequency distribution.

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