The term 'modal class' refers to the group or category in a set of data that appears most often. When data is organised in a frequency table or grouped into intervals, the modal class is the interval with the highest frequency, meaning it has the most data entries or values. This helps us understand which range of numbers is the most common.
For example, if you're looking at students' test scores grouped in ranges of 10 marks, and the range 60-70 has the highest number of students, then 60-70 is the modal class. In short, the modal class helps us see where the highest concentration of a dataset falls.
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