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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
Here is the information in bar graph form: Central tendency. Central tendency refers to the idea that there is one number that best summarizes the entire set of measurements, a number that is in some way central to the set. The mode.The mode is the measurement that has the greatest frequency, the one you found the most of.he median. The median is the number at which half your measurements are more than that number and half are less than that number. The median is actually a better measure of centrality than the mean if your data are skewed, meaning lopsided.