If the set of data are represented by a letter, then the mean is represented by that letter with a bar across its top.
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to represent the data givin, or you have found
The mean of a set of data is the sum of that data divided by the number of items of data.
Dot plots represent the values of a data-set which is classified according to two variables.
circle graphs
The mode of the data is the number which occurs most frequently in the given set of data.