cnd

Library "cnd"
Cumulative Normal Distribution

CND1(x)
  Returns the Cumulative Normal Distribution (CND) using the Hart (1968) method. (preferred method, 14-18 decimal accuracy)
  Parameters:
    x: float,
  Returns: float.

CND2(x)
  Returns the Cumulative Normal Distribution (CND) using the Abromowitz and Stegun (1974) Polynomial Approximation.
  Parameters:
    x: float,
  Returns: float.

CND3(x)
  Returns the Cumulative Normal Distribution (CND) using Newton-Cotes method, Boole’s rule
  Parameters:
    x: float,
  Returns: float.

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v2

Added:
CND4(Z)
  Returns the standard normal cumulative distribution function. The distribution has a mean of 0 (zero) and a standard deviation of one. Use this function in place of a table of standard normal curve areas.
  Parameters:
    Z: float, The value for which you want the distribution.
  Returns: float, standard normal cumulative distribution function