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2. Cumulative frequencies and distribution function
2.1 Cumulative frequencies
For ordinal qualitative variables and quantitative variables, we can exploit the order relationship existing between the possible values of the variable. Cumulative distributions are thus defined (table 7 ).
This concept is illustrated by example 1 in the table 8 .
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Cumulative frequencies and distribution function
Characteristics of a distribution. Central tendency and dispersion
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