Statistics Calculator: mean, median, mode, harmonic mean, geometric mean, minimum, maximum, range, variance, standard deviation, sum of squares, sum and count - 13 basic statistics in one run.

How to use:
1. Put one data set per line, as many sets as you like, e.g. 2, 4, 4, 4, 5, 5, 7, 9;
2. Choose the variance / standard deviation type: population divides by n, sample divides by n-1, then set the number of decimal places;
3. Hit Run - the first table gives centre and means, the second gives spread and extremes; copy the result or export it as CSV.

Notes: numbers may be separated by commas, spaces, tabs or any non-numeric character, and only the numbers are extracted. Blank lines and lines without numbers are ignored, and the number of ignored lines is reported. Limits: up to 20,000 numbers per line and 500 lines per run, anything beyond that is trimmed automatically with a notice. The harmonic and geometric mean need positive values (the geometric mean also allows 0), otherwise they show a dash; the sample variance also shows a dash when a group holds a single value. Values are computed in double precision, so more than 15 significant digits loses accuracy.

How it differs from the other tools here: this page is for many data sets at once and for the full set of basic statistics. Use the Standard Deviation Calculator for standard deviation alone, the Advanced Statistics Calculator for quartiles, IQR, skewness, kurtosis, coefficient of variation, Shannon entropy, the T statistic and Z scores, and the Number Frequency Analyzer to see how often each value occurs.