The most frequently occurring observation in a data set is called Mode (also known as modal value).This is a measure of the tendency of the data values.
Find the mode of 2, 5, 5, 8 and 9
In this case, the most frequently occurring value is 5. So, the mode is 5.
Mode of an ungrouped data is equal to the most frequent observation in the data. Data can consists of more than one mode.
A data distribution with one mode value is called unimodal whereas distributions with more than one mode values is called multimodal (they can be bimodal, trimodal etc.)
The method to determine the mode of discrete grouped data is the same as that of an ungrouped data. The observation that occurs maximum number of times in the given data set is the mode.
In order to determine the mode of continuous grouped data, we need the following steps:
`Mode` = `l + ((f_m-f_1)/(2f_m-f_1-f_2)) h`
l : lower class limit of the modal group
h : interval size of the modal group
`f_(m )`: frequency of the modal group
`f_1` : frequency of the group before the modal group
`f_2` : frequency of the group after the modal group