| statistics.mean() | Return the sample arithmetic mean of data, a sequence or iterator of real-valued numbers |
| statistics.median() | Return the median (middle value) of numeric data, using the common “mean of middle two” method |
| statistics.median_grouped() | Return the median of grouped continuous data, calculated as the 50th percentile, using interpolation |
| statistics.median_high() | Return the high median of data |
| statistics.median_low() | Return the low median of numeric data |
| statistics.mode() | Return the most common data point from discrete or nominal data |
| statistics.pstdev() | Return the population standard deviation (the square root of the population variance) |
| statistics.pvariance() | Return the population variance of data, a non-empty iterable of real-valued numbers |
| statistics.stdev() | Return the sample standard deviation (the square root of the sample variance) |
| statistics.variance() | Return the sample variance of data, an iterable of at least two real-valued numbers |