Failure probabilities for parametric survival models

DESCRIPTION:

Computes failure probabilities for the parametric survival distributions

USAGE:

f.phibf(z, distribution) 

REQUIRED ARGUMENTS:

z
The time value (may be negative).
distribution
the failure distribution. This may be one of "extreme", "gaussian", or "logistic".

VALUE:

The cumulative distribution function probability assuming link = "identity".

EXAMPLES:

f.phibf(1.96, "gaussian")