The reported trimmed mean will remain the same.įor new analyses, the new definition will be applied automatically.įor the trimmed mean spreadsheet functions When you selected a 20% trimmed mean in the old version, the report will show that this is now called a 10% trimmed mean. This is in agreement with SPSS, R and other major statistical packages.įor the summary statistics report, when recalling older analyses, MedCalc will adapt the % value of the trimmed mean. In the new MedCalc version, for a 20% trimming, the program trims 20% at the lower tail and 20% at the higher tail, so 40% in total.In previous MedCalc versions, for a 20% trimming, the program would trim 10% at the lower tail and 10% at the higher tail, so 20% in total.Revision of the definition of "percentage trimmed":.New: Yuen-Welch test for the comparison of 2 independent trimmed means.Ĭomputional notes are given on Calculation of Trimmed Mean, SE and confidence interval. New: Comparison of trimmed means of paired samples.
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