Standard Deviation
Calculates the sample standard deviation of a numeric vector. With
weights, uses the weighted population denominator
(sum(weights)).
x (Vector | List): The numeric
data.
na_rm (Bool): (Optional) logical.
Should missing values be removed? Default is false.
weights
(Vector[Float] | List[Float]): = NA Optional non-negative
observation weights.
The standard deviation.
sd([1, 2, 3, 4, 5])
-- Returns = 1.5811...