Mode
Mode is defined as the value of the variable that occurs most frequently.
Mode for Raw Data
In raw data, the most frequently occurring observation is the mode. That is data with the highest frequency is the mode. If there is more than one data with the highest frequency, then each of them is a mode. Thus we have Unimodal (single mode), Bimodal (two modes) and Trimodal (three modes) data sets.
Mode for Grouped Data
Mode is that value of x for which the frequency is maximum. If the values of x are grouped into the classes (such that they are uniformly distributed within any class) and we have a frequency distribution, then:
1. Identify the class which has the largest frequency (modal class)
2. Calculate the mode as
Mode = L + (f0 – f1) / (2f0 – f1 – f2) x h
L=Lower limit of the modal class
f0=Largest frequency (frequency of Modal Class)
f1=Frequency in the class preceding the modal class
f2=Frequency in the class next to the modal class
h=Width of the modal class
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