Cumulative standard deviation: Difference between revisions

r{{task|Probability and statistics}}

Write a stateful function, class, generator or coroutine that takes a series of floating point numbers, ''one at a time'', and returns the running [[wp:Standard Deviation|standard deviation]] of the series.

The task implementation should use the most natural programming style of those listed for the function in the implementation language; the task ''must'' state which is being used. Do not apply [[wp:Bessel's correction|Bessel's correction]]; the returned standard deviation should always be computed as if the sample seen so far is the entire population.

 

Use this to compute the standard deviation of this demonstration set, <math>\{2, 4, 4, 4, 5, 5, 7, 9\}</math>, which is <math>2</math>.

 

'''See also:'''

* [[Moving Average]]

* [[Random numbers]]

 

=={{header|360 Assembly}}==