OptionallogIf true, probabilities are given (to qnorm) and returned (from pnorm) as log(p). Default false.
OptionallowerIf true, probabilities are P[X <= x]; if false, P[X > x]. Default true.
OptionalmeanMean. Default 0.
OptionalsdStandard deviation. Default 1.
Options for pnorm and qnorm.