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Give the difference between Dispersion and Skewness. 

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Basis Dispersion Skewness
Nature Shows the spread of values from the central value Shows whether series is symmetrical or asymmetrical
Basis It depend upon the averages of second order. Depends upon the averages of first and second order.
Relationship with moment                        Based on all three moments Based on first and third moment only.
Variability Study of the Variabili

 
Study of concentration in lower and higher variables.
Diagrammatic presentation Cannot be presented by means of diagrams & graphs. Skewness can be presented by diagram.
Inference All the measures of dispersion are positive.
 
Coefficient of skewness can be positive or negative.

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