Question

what do you mean by number of occurrence

Answer 1

Dear student,
Frequency distribution in statistics provides the information of the number of occurrences (frequency) of distinct values distributed within a given period of time or interval, in a list, table, or graphical representation.
Mode is the observation that occurs most frequently in the data. If each of the values in a data are occurring one time (or equal number of times), then all are mode. Sometimes, we also say that this data has no mode since none of them is occurring frequently.

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