1s_logrank.xls is for computing one sample log rank test, confidence intervals for the SMR, calculating estimate for survivorship in the matched standard population and visually comparing survivorship of the sample to that of the standard population as described in the paper and instructions (both included in the zip file). The paper was published in the Journals of the National Cancer Institute, Vol. 95, No. 19, Oct 1 2003 pp. 1434–1439 as a commentary.