Sequential testing of the equality of two survival distributions using the modified Savage statistic
James A. Koziol, A. John Petkau · Biometrika · 1978
Sequential procedures based on the modified Savage statistic are proposed for testing the equality of two survival distributions when observations are singly censored. Asymptotic properties, including expected sample sizes and power against contiguous exponential scale shift alternatives, are examined. Comparison is made with procedures based on a modified Mantel-Haenszel statistic (Muenz, Green & Byar, 1977).