数学
即时、私密且免费
统计计算器.
Calculate mean, median, mode, range, variance, and standard deviation
输入数值
输入时结果会更新。
常见问题
Can I enter values separated by commas or spaces?
Yes. The calculator accepts commas, spaces, semicolons, and line breaks.
Does this use sample or population variance?
This tool reports sample variance and sample standard deviation by default.
How to Use the Statistics Calculator
Enter a data set to compute mean, median, mode, range, variance, and standard deviation.
- Enter your numbers separated by commas or spaces.
- The calculator computes all summary statistics.
- Review measures of center and spread.
Key Statistics Formulas
Mean
Sum of values divided by the count.
Example:
Input: 2, 4, 6
Calculation: 12 / 3
Result: 4
Sample Variance
Average squared deviation, using n−1 for a sample.
Example:
Input: 2, 4, 6
Calculation: (4+0+4)/2
Result: 4
Standard Deviation
Square root of the variance, in the original units.
Example:
Input: variance = 4
Calculation: √4
Result: 2
Real-World Use Cases
Data Analysis
Summarize a dataset before deeper analysis.
Quality Control
Track spread to detect process drift.
Tips
Tips
- Use sample (n−1) statistics for a sample, population (n) for a full population.
- The median resists outliers better than the mean.