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The arithmetic mean is the most common measure of central tendency. It is simply the sum of the numbers divided by the number of numbers. The symbol Î¼ is used for the mean of a population. The symbol M is used for the mean of a sample. The formula for Î¼ is shown below: Î¼ = Î£X/N
To understand a set of data, you need to organize and summarize the data using a measure of central tendency. You must decide which measure of central tendency best describes a set of data. Below is a review of mean, median, and mode, and where you would use each as the measure of central tendency.