Tukey's HSD test allows one to compute a single value that determines the minimum difference between treatment means that is necessary for significance.

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Tukey's HSD test calculates a critical value that represents the minimum significant difference between the means of different treatments. It is not a single value, but rather a range of values within which the mean difference must fall for the comparison to be considered statistically significant.

Tukey's HSD Test Allows One to Compute a Single Value