stpower exponential — Sample size and power for the exponential test Syntax Menu Description Options Remarks and examples Stored results Methods and formulas References Also see Syntax

Specifying hazard rates stpower exponential [ h1 h2, options Specifying survival probabilities stpower exponential s1 s2, t(#) options Power determination Specifying hazard rates stpower exponential [ h1 h2, n(numlist) options Specifying survival probabilities stpower exponential s1 s2, t(#) n(numlist) options where h1 is the hazard rate in the control group; h2 is the hazard rate in the experimental group; s1 is the survival probability in the control group at reference (base) time t; and s2 is the survival probability in the experimental group at reference (base) time t. h1, h2 and s1, s2 may each be specified either as one number or as a list of values (see [U] 11.1.8 numlist) enclosed in parentheses. 1 2 stpower exponential — Sample size and power for the exponential test option