NORMSDIST function

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
FUNCTIONS
Probability and statistics
Correlation and line fitting
Ranking

NORMSDIST

Calculates values for the cumulative distribution function of a normal distribution.

Syntax:

NORMSDIST(x)

The standard normal distribution is a normal distribution with mean μ = 0 and standard deviation σ = 1.
NORMSDIST calculates the cumulative distribution function of the standard normal distribution.
It is equivalent to NORMDIST(x; 0; 1; 1).

Example:

NORMSDIST(0)

returns 0.5. The standard normal distribution curve is centred on 0, hence half of the curve is below 0.

NORMDIST(0; 0; 1; 1)

also returns 0.5.

Issues:

• The forthcoming international standard ODFF regards this as a legacy function, preferring NORMDIST.
• The accuracy is insufficient for x < −2. The error will hopefully be fixed in OOo3.2. You should use the equation
NORMSDIST(x) = 0.5 * ERFC(-x/SQRT(2)) for x < −2.
The function ERFC belongs to the category Add-in.