Example 12.5 Two samples of sizes 40 and 50, respectively, are taken from a population with unknown mean u and unknown variance o². Sample I: n₁ = 40, = 807, Sample II : n₂ = 50, Ef x₂ = 977, Σf x = Using the data from the two samples, obtain the best estimates of μ and o². Σf x = 16329 = 19177

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