Combistat

CombiStat is a programme that performs two useful mathematical procedures involving standard errors of the mean (SEM). Its main use is for combining several Mean +/- SEM values into an overall Mean +/- SEM. This is a frequent requirement for researchers repeating an experiment several times, each time obtaining a Mean +/- SEM for the parameter(s) under study. Additionally, in version 1.1 the programme will calculate the SEM and standard deviation of both the ratio (X1/X2) and the product (X1*X2) of two independent variables, X1 and X2, each having an associated SEM. For more information see the accompanying Read me file. CombiStat should run on any Mac and has been tested with System 7.6.1 and 7.5.3 The programme is freeware. Steve Ashcroft Dr SJH Ashcroft, Nuffield Dept. of Clinical Biochemistry, John Radcliffe, Hospital, Headington, Oxford OX3 9DU email: stephen.ashcroft@ndcb.ox.ac.uk phone: +44 1865 220480 FAX : +44 1865 221834