Mean absolute deviation measures the average distance of values from their arithmetic mean.
Mean Deviation Calculator
Mean Deviation Form
Results
Mean Deviation
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Mean
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Table of Contents
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What is Mean Deviation ?
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How to Use This Calculator
- Enter or select Values (comma separated).
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
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Formula Used
MAD = Σ|xᵢ−mean| / n
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Variables Explained
| Input | What it means |
|---|---|
| Values (comma separated) | The stated rate or percentage, entered using the scale and time period shown in the form. |
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Worked Example
For 2, 4, 6, the mean is 4 and MAD is (2+0+2)/3 ≈ 1.33.
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Why Use This Calculator?
Describe a typical absolute distance from the mean in the original data units.
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Common Mistakes
- Use absolute differences; signed differences cancel out.
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Frequently Asked Questions
Does a calculated statistic prove a conclusion?
A statistic describes the supplied data under stated assumptions. Sampling design, missing observations and the suitability of the model still determine what can reasonably be concluded.
Should I include every observation?
Use the observations required by your study design and state any exclusion rule. Removing values only because they change the answer can bias the analysis.
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Sources & References
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