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Mean vs Median — Difference (with Table & FAQs)

Mean is the average of all values in a dataset. Median is the middle value when data is arranged in order.

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TL;DR: Mean is the average of all values in a dataset. Median is the middle value when data is arranged in order.

Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated Jul 23, 2026

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The main difference between Mean and Median: Mean is the average of all values in a dataset. Median is the middle value when data is arranged in order.

Mean vs Median — Comparison Table

BasisMeanMedian
DefinitionSum divided by number of valuesMiddle value in ordered data
FormulaMean = Sum / nPosition = (n+1)/2 for odd n
Effect of OutliersAffected greatly by extreme valuesUnaffected by extreme values
CalculationAdd all values, divide by countFind middle value after sorting
Even/Odd DataSame processAverage two middle values if even
UseBest for normal distributionBest for skewed data

Key Points

  • Mean is affected by all values including outliers
  • Median is more robust for skewed data
  • Both are measures of central tendency
  • Mode is third measure of central tendency

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