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Tukey-Kramer test

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Hello, if I wanted to determine if there were a significant difference in the means for three or more populations, why couldn't I perform t-test and compare them in pairs to identify the differences? Is there a specific reason why a Tukey-Kramer test is used?

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Tukey-Kramer tests are briefly justified in this posting.

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The Tukey-Kramer test is a single-step multiple comparison test which is used to determine whether three or more means differ significantly in an ANOVA. It compares all the possible pairs of means in each sample. There is an assumption for the test of equal variance for the ...

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