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

stdev

• stdev(k: number, lambda: number): number

• Returns the standard deviation of an Erlang distribution.

  Notes

  • If not provided a positive integer for k, the function returns NaN.
  • If provided a non-positive value for lambda, the function returns NaN.

  Parameters

  • k: number

    shape parameter

  • lambda: number

    rate parameter

  Returns number

  standard deviation

  Example

  var v = stdev( 1, 1.0 );
  // returns 1.0

  Example

  var v = stdev( 4, 12.0 );
  // returns ~0.167

  Example

  var v = stdev( 8, 2.0 );
  // returns ~1.414

  Example

  var v = stdev( 1.5, 2.0 );
  // returns NaN

  Example

  var v = stdev( 1, -0.1 );
  // returns NaN

  Example

  var v = stdev( -0.1, 1.0 );
  // returns NaN

  Example

  var v = stdev( 2, NaN );
  // returns NaN

  Example

  var v = stdev( NaN, 2.0 );
  // returns NaN