14.4: Critical values for Welch's \(t\)-Test
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These are the critical values for a two-tailed \(t\)-test. For a one-tailed \(t\)-test, divide the significance levels by two (i.e., the values in the column for a level of 0.1 in a two-tailed test correspond to the level of 0.05 in a one-tailed test, etc.)