1.

Explain grouping method.

Answer»

First of all, a table is made in grouping method, in which there are 6 columns for additional frequencies apart from variable values (x).

Serial NumberVariable-value (x)
1.Frequencies (f)
2.Sum of 2-2 frequencies
3.Sum of 2-2 frequencies except first frequency
4.Sum of 3-3 frequencies
5.Sum of 3-3 frequencies except first frequency
6.Sum of 3-3 frequencies except first two frequencies

After grouping the frequencies in the above manner, each column’s greatest frequency is circled with a pencil and by marking the variable values of these greatest frequencies, calculation are done through analytical table. The variable value having the greatest number of marks in front of it is the mode value.


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