How to perform student ttest with logtransformation in r commander. The data are arranged in rows and columns each row contains the data for one replicate unit. R commander rcmdr r provides a powerful and comprehensive system for analysing data and when used in conjunction with the rcommander a graphical user interface, commonly known as rcmdr it also provides one that is easy and intuitive to use. To present means or other summary statistics, you might present the mean of transformed values. Data transformation and normality testing duration. Once you have installed r and have it running see here, it is a simple matter to install the r commander gui. If you install the rcmdr package via the windows r gui, not all of the packages on. To install r and all the packages used on the cd including rcmdr onto. While the transformed data here does not follow a normal distribution very well, it is probably about as close as we can get with these particular data. Commander menus seems appropriate, i will add a transform menu under. Im very new to r and never really had a head for statistics, but i feel like i should be able to get this without issues. The log transformation is a relatively strong transformation. Information about installing the r commander on these platforms is available by following. Tech knowledge base data analysis r and r commander installing r and rcommander on windows installing r this is done first but only once installing r commander must be done after r is installed but only once starting r commander this is done every time you want to run it links to using r commander sites that explain how.
Pdf logtransformation and its implications for data analysis. Although this can be achieved using the pulldown menus in some r consoles, the following procedure demonstrates the installation using the command line, as this applies to all platforms. This video shows how to perform student ttest with log transformed outcome variable. How to perform student ttest with logtransformation in r.
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