What Is The Difference Between Stratum And By Statement In Proc Lifet

1.	What Is The Difference Between Stratum And By Statement In Proc Lifetest?
Answer» We specify a BY statement with PROC LIFETEST to obtain separate ANALYSES on observations in GROUPS defined by the BY VARIABLES. We specify a BY statement with PROC LIFETEST to obtain separate analyses on observations in groups defined by the BY variables.

What Is The Difference Between Stratum And By Statement In Proc Lifetest?

Answer»

We specify a BY statement with PROC LIFETEST to obtain separate ANALYSES on observations in GROUPS defined by the BY VARIABLES.

We specify a BY statement with PROC LIFETEST to obtain separate analyses on observations in groups defined by the BY variables.