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If a data set is ordered in ascending or descending order, any measure that is located in the center of that set is called a measure of centralization. It can also be called average

THE MODE

• The mode for a data set is the data that occurs most frequently. If there are several values ​​of the variable with the same frequency and maximum, then all these values ​​of the variable constitute the mod. If all the values ​​of the variable have the same frequency, then there is no mode.
• The mode for grouped data
  • Xmo =Lri + (Δ1 Δ1 + Δ2 ))* A
• The quartiles
  • Quartiles are measures that divide a data set into four equal parts, these are three values ​​Q1, Q2, Q3, called the first, second, and third quartiles, respectively.
• The deciles
  • Deciles are measurements that divide a data set into ten equal parts these are nine values ​​D1, D2,...D8, D9, called first, second,... eighth and ninth decile respectively
• Percentiles
  • The perceptiles divide a series of data into one hundred equal parts, the perceptiles are ninety-nine and go from P1, P2, P3,..., P98, P99.

THE MEDIAN

• The median for a series of data ordered in ascending or descending order is the central data; if the number of data is odd; y is the arithmetic mean of the two central data, if the number of data is odd.

THE MEAN

• The mean, also known as the average, is the value obtained by dividing the sum of a conglomerate of numbers by the number of them.
• Weighted mean
  • The weighted mean or weighted average is a type of arithmetic mean where each of the values ​​is weighted according to its importance in the geneal group.
• The geometric mean
  • The geometric mean of a data set is the nth root of the product of many numbers.
• The harmonic mean
  • The harmonic mean is the inverse of the arithmetic mean of the inverses of the terms of a sequence.
• The square mean
  • The mean square of a data set is the square root of the arithmetic mean of the squares of the data.