Statistic        Statistics         Introduction Central Tendency Measures Mean Geometric Mean Media Armónica Mediana Moda Measures of Location Centiles Deciles Cuartiles Ejercicio Measures of Position Introducción Desviación media Varianza Desviación típica Coeficiente de variación Ejercicio Medidas de Forma Asimetría Apuntamiento Test      Deciles

Deciles are those values of the variable that divide the total frequency into 10 equal parts.
The k-th decile denoted by Dk is computed as follows: where:

• L is the lower limit of the class containing Dk
• f is the frequency of the class containing Dk
• h is the width of the class containing Dk
• C is the cumulative frequency of the class preceding the class containing Dk

Here the cumulative frequency just greater than is the class containing Dk (K=1,2,...,9)

Determine D5 from the following distribution

 Class Frequency Cumulative frequency 0-5 20 20 5-10 15 35 10-15 31 66 15-20 22 88 20-25 10 98 25-30 2 100

Here . The cumulative frequency just greater than 50 is 66, so the class 10-15 contains D5

L=10, f=31, h=5, C=35, Therefore 