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What is the mode of the following data? 12, 15, 12, 18, 15, 12, 20, 18, 15, 12
12
15
18
20
12
Create a quick tally mark table or mentally count the occurrences of each unique number; the one that appears most often is the mode.
A data set of ten observations: 12, 15, 12, 18, 15, 12, 20, 18, 15, 12.
Mode=Observation┬аwith┬аmaximum┬аfrequency
Create a quick tally mark table or mentally count the occurrences of each unique number; the one that appears most often is the mode.
Students often miscount the frequency of numbers or accidentally select the mean or median instead of the most frequent value.
List unique values and their frequencies
Identify every distinct number in the dataset and count how many times each one appears.
12:4,15:3,18:2,20:1
Compare frequencies
Compare the frequency counts to find the maximum occurrence.
Max┬аFrequency=4
Determine the Mode
The value corresponding to the frequency of 4 is the mode of the dataset.
Mode=12
A is correct because the number 12 appears 4 times, which is more frequent than any other value in the dataset.
Understanding mode is critical for data interpretation in Competitive Aptitude exams; note that in bimodal data, there are two modes, and in uniform data, there is no mode.