For instance, I have a bar chart - in which I have 4 samples/bars. for these 4 bars, I want to check statistical significance for all combinations.

  1. How can I do it? Can unpaired t-test be used - to compare 2 samples at a time? or this is not correct. What is then the appropriate way in which all the samples/ bars can be compared against each other at the same time.

  2. Is there any easy-quick way to nicely represent it in a chart?


  • $\begingroup$ You may have to correct for multiple testing in this context. You can find more information about that here: en.wikipedia.org/wiki/Multiple_comparisons $\endgroup$ – Marc Claesen May 15 '13 at 9:10
  • $\begingroup$ thanks for a quick response. the link was helpful, although I am still a bit confused - more so, because I am not too much into statistics. $\endgroup$ – abhishek May 15 '13 at 9:35

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