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...RoundingTimes? Friedman chi-squared = 11.1429, df = 2, p-value = 0.003805 Same data, in Excel, using the WinSTAT for Excel (Fitch software), gives: Friedman chi-squared = 10.6364, df = 2, p-value =0.004902 Puzzled, I entered the data in the calculator from Vassar (http://faculty.vassar.edu/lowry/fried3.html ) and got exactly the same values as in Excel (and, again, different from R). Admittedly, the differences are not large, and both fall below the 0.05 threshold, but, still. So, question 1 would be "why is R different from both Excel and Vassar?" Now to the Kolmogorov?Smirnov test,...