Modal value refers to the mode in mathematics, which is the most common number in a set of data. For example, in the data set 1, 2, 2, 3, the modal value is 2, because it is the most common number in the set.
The mode is one of the most common ways to describe a set of data. Often, when large sets of data are being analyzed, it is useful to calculate the mean, mode and median to quickly gain insight into how the numbers are distributed. The mean is the average of the data set, while the median is the middle number when ordered from smallest to largest.