Descriptive Statistics
Summarise a continuous dataset using sample statistics and interpolated quartiles.
Descriptive Statistics
Browser-only calculations · No input data saved
Worked example results
- Count
- 5
- Mean
- 3
- Median
- 3
- Sample standard deviation
- 1.581139
- Sample variance
- 2.5
- Minimum
- 1
- Maximum
- 5
- Range
- 4
- Q1
- 2
- Q3
- 4
Rounded for display only. Export includes the inputs, results, method and assumptions. Refreshing or leaving the tool clears entered data.
How to use Descriptive Statistics
- Load the worked example to see the required input format.
- Summarise a continuous dataset using sample statistics and interpolated quartiles. Use consistent units, periods and definitions.
- Select Calculate, review the assumptions and export the result for your project evidence.
Formula and method
Mean = Σx/n; sample variance = Σ(x−mean)²/(n−1); quartiles use linear interpolation at (n−1)p.
Interpretation and assumptions
Use numeric observations from the same measurement scale. Outliers, skew and time order may matter more than a single summary. Standard deviation uses the sample denominator n−1.
Results support professional judgement. They are not a certification of process stability, a financial commitment or a substitute for study design.
Frequently asked questions
How do I use the descriptive statistics?
Summarise a continuous dataset using sample statistics and interpolated quartiles. Load the example first, then replace all inputs with consistent process data and select Calculate. Mean = Σx/n; sample variance = Σ(x−mean)²/(n−1); quartiles use linear interpolation at (n−1)p.
What assumptions matter for descriptive statistics?
Use numeric observations from the same measurement scale. Outliers, skew and time order may matter more than a single summary. Standard deviation uses the sample denominator n−1.
Are my calculator inputs saved or sent to a server?
These native calculations run in this browser tab. Inputs are not sent to a server or saved by this calculator. Download the result if you need a record; leaving or refreshing clears the form.