A Further Analytical Step Multiple Comparisons

The other two calculations are performed similarly and the resulting differences placed into the trellis. 

the test statistic for this test is calculated. This test statistic used in this analysis is represented by the capital letter T. This test statistic is then used as a 

Dose treatment group and group mean 20 mg (-11 mmHg) 30 mg (-12 mmHg) 

These results now provide the full numerical answer to the original research question. As always, the numerical results need to be interpreted in words in the context of the specific study. This interpretation requires combining the information from the Tukey test with the group means calculated earlier  

The Tukey test that was employed in our hypothetical example is structured to take a conservative approach in an ingenious manner. Keeping aU other considerations and variables constant, as the number of treatment groups increases (i.e., as the number of comparisons being made increases), the size of the test statistic T increases. Since the difference between any two groups means has to exceed the 

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