std.math.stats

The mean, the sum over the count, or the sum of each value's share where the sum overflows and the values don't. No values panics.

The middle value, or the mean of the two middle ones for an even count. No values, or a NaN, panics.

The variance of a sample, the squared differences from the mean over the count less 1, as an estimate of the variance of all it was drawn from. Fewer than two values panics.

The standard deviation of a sample: the square root of its Variance. Fewer than two values panics.

The variance of the values as the whole population: the squared differences from the mean over the count. No values panics.

The standard deviation of the values as the whole population: the square root of their PopulationVariance. No values panics.

The value below which percent of them lie, from 0 for the least to 100 for the largest, between the two nearest when it falls between them, as NumPy's percentile does: 50 is the Median. No values, a NaN, or a percent outside 0 to 100, panics.

How many values fall in each of bins equal ranges from low to high, the last range holding high too; those outside, and NaN, are left out. A count of bins that isn't above 0, or a low that isn't below high, or isn't finite, panics.

How many values fall in each of bins equal ranges from the least value to the largest, which all do. No values, a NaN or an infinite one, or a count of bins that isn't above 0, panics.