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Descriptive Statistics Calculator
Quick answer
If values are 12, 15, 15, 18, 22, 27, 31, the mean is 20, the median is 18 and the sample SD is 6.9761.
What it reports: Mean = sum ÷ n; Median = middle value of the sorted list; Sample SD = √( Σ(x − mean)² ÷ (n − 1) ).
Enter your values
- 12
- 15
- 15
- 18
- 22
- 27
- 31
7 values
Summary
20
The arithmetic average — every value added together, divided by how many there are.
90% is median
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About the Descriptive Statistics Calculator
A quick summary of a data set gives its centre and its spread at once: the mean, the median and the sample standard deviation. Enter your values to see all three together.
For 12, 15, 15, 18, 22, 27 and 31, the mean is 20, the median is 18 and the sample standard deviation is about 6.98.
What it reports
Mean = sum ÷ n
Median = middle value of the sorted list
Sample SD = √( Σ(x − mean)² ÷ (n − 1) )
Things to keep in mind
- If the mean is well above the median, a few large values are pulling the average up.
- The standard deviation shows the typical distance from the mean.
- Use sample standard deviation for samples and population standard deviation for a whole group.
STATISTICS & PROBABILITY GUIDE
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How to Use the Dataset Summary Calculator
1
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2
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What is Dataset Summary?
This statistics & probability tool works out your mean instantly, so you don't have to do the math by hand.
“One quick calculation, so you always know your mean before you decide.”
What Affects Your Mean
Your mean depends on the values below.
Values
Changing your values changes your mean.
Example Result
Here's what you can expect from a dataset summary calculation:
- Mean
- 20
- Median
- 18
- Sample SD
- 6.9761
Frequently Asked Questions
- How to calculate dataset summary?
- Fill in values in the Descriptive Statistics Calculator above and your mean is calculated instantly. Change any value to see how the result responds.
- What does an example dataset summary calculation look like?
- If values are 12, 15, 15, 18, 22, 27, 31, the mean is 20, the median is 18 and the sample SD is 6.9761.
- Is this calculator free to use?
- Yes — every calculator on this site is completely free, with no sign-up or account required.
- How accurate is this calculator?
- It uses the standard formula and calculates on our server for every request, so results are precise for the values you enter.
- Is my data saved anywhere?
- No. Nothing you enter is stored or sent anywhere unless you choose to share a link with your values included.
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