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Math & AlgebraGenerated accuracy model review: 2026-05-06
Mean, Median, Mode accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- 1. **Mean**: Sum of all values / Count of values. 2. **Median**: The middle number when sorted (or average of the two middle numbers). 3. **Mode**: The number that appears most often. 4. **Range**: Maximum value - Minimum value.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Data Set: 12, 5, 8, 12, 20, 5, 12
Expected outputs
- Mean (Average): 10.57
- Median (Middle): 12
- Mode (Frequent): 12
- Range: 15
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- The dataset should contain valid numeric values separated by commas, spaces, or line breaks.
- Mean is sensitive to outliers, so extreme values can pull the average away from the median.
- This tool summarizes the list you enter directly; it does not infer missing values or weight observations.
Unit handling
- Data Set accepts text values.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current mean-median-mode-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Mean, Median, Mode.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.