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Calculate a weighted average from a list of values and matching importance weights. Weights must be nonnegative and at least one weight must be positive. This browser-local calculator updates from numeric inputs and shows a labelled breakdown without uploading your data.
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Calculate a weighted average from a list of values and matching importance weights. Weights must be nonnegative and at least one weight must be positive.
The sum is 20 across five numbers. The value 10 raises the mean above the middle value.
The middle values are 0 and 4, so their midpoint is 2.
Here, average means the arithmetic mean: sum divided by count. Median is the middle of the sorted list. A high outlier can change the mean substantially while changing the median very little.
This tool gives each entered value equal weight. It does not calculate a weighted mean; enter repeated observations individually only when each occurrence is one observation.
The squared deviations sum to 20. Divide by 4 for the population or 3 for the sample, then take the square root.
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