ERF function

The ERF function returns the integral of the Gauss error function over an interval of values.

Parts of an ERF formula

ERF(lower_bound, [upper_bound])

Part	Description	Notes
`lower_bound`	If this parameter is the only parameter, the integral is taken between 0 and this value. If z2 is provided, it refers to the lower boundary for the integral.
`upper_bound`	The upper boundary of the integral.	Upper boundaries are optional.

ERF(-2.3, -0.7)

ERF(1)

If the lower or upper boundaries are non-numeric, ERF returns "#VALUE!."

ERFC: The ERFC function returns the complementary Gauss error function of a value.
NORMDIST: The NORMDIST function returns the value of the normal distribution function (or normal cumulative distribution function) for a specified value, mean, and standard deviation.