Mid value of frequency distribution of marks
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It is series that deals with discrete variables. It is the series in which data are presented in a way that exact measurement of units of the items or terms are shown clearly.
If we are to prepare discrete series from individual series or raw data, it is better to place values in ascending order, then against these variables we put tally bar for each item against the corresponding variable, then number of total tally bars is counted and a numerical number is put in 3rd column as frequency.
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