Mathematics, 06.08.2019 00:30 teescub812

Let μ1 and μ2 denote true average densities for two different types of brick. assuming normality of the two density distributions, test: h0: μ1 − μ2 = 0 versus ha: μ1 − μ2 ≠ 0 use the following data: n1 = 6, x1 = 23.72, s1 = 0.55, n2 = 4, x2 = 20.88, and s2 = 0.530. the conservative degrees of freedom, min(n1-1, n2-1), are:

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