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

mean

• mean(lambda: number): number

• Returns the expected value of a Poisson distribution.

  Notes

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

  Parameters

  • lambda: number

    mean parameter

  Returns number

  expected value

  Example

  var v = mean( 9.0 );
  // returns 9.0

  Example

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

  Example

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

  Example

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