π Statistics & Probability
Dataset Summary Statistics Generator
Paste a column of numbers to get count, mean, median, standard deviation, min, max and range in one click. Free.
What This Calculator Tells You
Paste a column of numbers and get the descriptive statistics you need to understand it in one go: count, mean, median, standard deviation, minimum, maximum and range. It is the quickest way to answer 'what does this data look like?' before deciding what to do with it.
All calculations run in your browser, so you can use it on private sales or customer data.
What to Enter
- Numeric column data β numbers separated by commas, spaces or new lines. You can copy a column straight from Excel or Google Sheets. Text, currency symbols and blank cells are ignored, so clean them out if you want them counted.
Worked Examples
1. Daily orders over ten days
12, 15, 14, 18, 20, 22, 19, 17, 16, 21.
- n 10, mean 17.4, median 17.5, standard deviation 3.20, min 12, max 22, range 10.
- Mean and median are close, so the data is fairly symmetric with no big outliers.
2. Spotting skew in order values
A column of 500 order totals shows mean $96 and median $61.
- When the mean is well above the median, a few large orders are pulling it up. Report the median as the typical order.
3. Quality check before analysis
A minimum of β1 in a column of ages or a maximum ten times bigger than everything else points to data-entry errors to fix first.
- Always look at min and max before trusting the average.
How to Read Your Result
- Mean vs median: close together means roughly symmetric data; far apart means skew or outliers.
- Standard deviation (sample) shows typical distance from the mean; compare it with the mean to judge how variable the data is.
- Range is max β min and is very sensitive to a single extreme value.
- Next step: see the full shape with the histogram generator.
Common Mistakes to Avoid
- Reporting only the mean for skewed data like income or revenue.
- Leaving in placeholder values such as 0 or 999 for missing data.
- Mixing units (dollars and cents, or thousands) in one column.
- Summarizing too few values β with under 10 data points, statistics are fragile.
When to Use This Calculator
- Get a quick profile of any numeric column.
- Check data quality before modelling or reporting.
- Choose between mean and median for a report.
- Answer statistics homework and exam questions.
Frequently Asked Questions
Is this an AI tool?
No. It uses standard statistical formulas, which give exact, repeatable results. You get the same answer every time for the same data.
Is standard deviation sample or population?
Sample (dividing by n β 1), the right choice for most real data. The standard deviation calculator shows both.
Can I paste several columns?
Paste one column at a time. For relationships between columns, use the correlation matrix generator.
Is my data stored?
No. Everything is calculated in your browser.
Do you store the values I enter?
No. All calculations happen in your browser. Your data never leaves your device.
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