Received a comment from a reviewer. The reviewer commented that i should provide an estimate of the total uncertainty of the measurement (not just the sd (standard deviation) for the set of measurements). We are using SPSS 17.0 software for one-way analysis of variance (ANOVA) for the statistic. A colleague explained that the reviewer would like to have further statistics such as the significant value or the correlation of the result. Hope someone can explain further regarding this matter. Thank you in advance.