_______is the score which appears the maximum number of times in an observation.
The number of times a certain observation appears in the data is called its __.
The following pictograph represents some surnames of people listed in the telephone directory of a city. Observe the pictograph and answer the following question: (a) How many people have the surname Roy? (b) Which surname appears the maximum number of times in the telephone directory? (c) Which surname appears the least number of times in the directory? (d) Which two surnames appear an equal number of times?
The maximum number of times an observation occurs in a given data is called ____.