Mathematics & Education Formula • Published on September 01, 2026 • Last updated September 01, 2026
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Arithmetic Mean (Average)
Sum of all individual dataset values
Total count of observations in sample
The arithmetic mean formula calculates the central average value of a sample dataset by summing all observation values and dividing by the total sample count.
Extreme high or low outliers skew the mean heavily, which is why median is often preferred for skewed distributions like income data.
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