Statistics Calculator reads a list of numbers separated by commas, spaces, or new lines, and reports the common descriptive statistics.
It gives both the population and sample standard deviation, the quartiles and interquartile range, and the geometric and harmonic means when every value is positive. It runs in your browser.
Population divides by n; sample divides by n minus 1 and is the right choice when your numbers are a sample of a larger group. Both are shown.
By linear interpolation between the closest ranks, which is one of the common methods and matches many spreadsheet tools.
They are only defined for positive numbers, so they are omitted if any value is zero or negative.
No. The tool runs entirely on this page.