stddev
Computes the standard deviation of all grouped values.
stddev(xs:list) -> floatDescription
The stddev function returns the standard deviation of all numeric values in
xs.
xs: list
The values to evaluate.
Examples
Compute the standard deviation of values
from {x: 1}, {x: 2}, {x: 3}
summarize stddev_value=stddev(x)
{stddev_value: 0.816}