External module "stats/base/dists/poisson/stdev/docs/types/index.d"

stdev

• stdev(lambda: number): number

• Returns the standard deviation of a Poisson distribution.

  Notes

  • If provided a negative value for λ, the function returns NaN.

  Parameters

  • lambda: number

    mean parameter

  Returns number

  standard deviation

  Example

  var v = stdev( 9.0 );
  // returns 3.0

  Example

  var v = stdev( 1.0 );
  // returns 1.0

  Example

  var v = stdev( -0.2 );
  // returns NaN

  Example

  var v = stdev( NaN );
  // returns NaN