Statistics Calculator
Mean, median, mode, SD and more. Free, no sign-up.
10 values
Mean
15
Median
15
Mode
15
appears 3×
Std deviation
2.7487
sample (n − 1)
- Count (n)
- 10
- Sum
- 150
- Minimum
- 11
- Maximum
- 20
- Range
- 9
- Q1 (lower quartile)
- 13
- Q3 (upper quartile)
- 17
- Interquartile range
- 4
- Variance (sample)
- 7.5556
- Variance (population)
- 6.8
- Std deviation (sample)
- 2.7487
- Std deviation (population)
- 2.6077
- Standard error of mean
- 0.8692
- Coefficient of variation
- 18.32%
- Outliers (1.5 × IQR rule)
- None
Histogram
Sorted data
11, 12, 13, 14, 15, 15, 15, 17, 18, 20
Quartiles use the median-of-halves method taught in most school textbooks. Spreadsheet functions (like Excel QUARTILE.INC) can give slightly different values.
Questions
Sample or population standard deviation?
Both are shown. Use the sample value (divides by n − 1) when your numbers are a sample from a bigger group, which is usually the case in experiments and surveys.
Can I enter a frequency table?
Yes. Switch to “Value + frequency” and enter each value with how many times it occurs.