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The mode of a set of data is the value in the set that occurs most often. In other words, it is the value that is most likely to be sampled. A set of data can be bimodal. It is also possible to have a set of data with no mode.
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Example: Find the mode of:
9, 3, 3, 44, 17, 17, 44, 15, 15, 15, 27, 40, 8
Solution: Put the numbers is order for ease:
3, 3, 8, 9, 15, 15, 15, 17, 17, 27, 40, 44, 44
The Mode is 15 (15 occurs the most at 3 times)
Note: It is important to note that there can be more than one mode and if no number occurs more than once in the set, then there is no mode for that set of numbers.
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