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Se deduce: Xത1 −Xത2 ~ t(n1 + n2 − 2) Datos: n1 = 12 S1 2 = 8.44 n2 = 15 S2 2 = 9.44 SP 2 = (12-1)8.44 + (15-1)9.44 / 12 + 15 - 2 = 8.8 t = (3 - (62.037 - 61.022)) / √(8.8(1/12 + 1/15)) = 2.12 P(t > 2.12) = P(t(25) < 2.12) = 0.0211

Author

angel rivera

Language

ES