Calculates values for a standard normal distribution.
Syntax:
PHI(x)
The standard normal distribution is a normal distribution with mean μ = 0 and standard deviation σ = 1.
PHI calculates the probability density function of the standard normal distribution; in other words it returns NORMDIST(x, 0, 1, 0).
Example:
PHI(0.5)
returns approximately 0.35206.
NORMDIST(0.5, 0, 1, 0)
returns approximately 0.35206.