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Sample means X1. = -9.62 X2. = -20.94 X3. = -3.76 X4. = -14.19 Difference Confidence interval H1 - H2 (5.2, 17.4) H1 - H3

Sample means X1. = -9.62 X2. = -20.94 X3. = -3.76 X4. = -14.19 Difference Confidence interval H1 - H2 (5.2, 17.4) H1 - H3 (-12.0, 0.2) (-1.5, 10.7) H2 - H3 (-23.3, -11.1) H2 - H4 (-12.9, -0.7) 13 - 14 (4.3, 16.5)

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