Assume the Competing Hypotheses Take the Following Form H₀: µ₁-µ₂

question 72

Multiple Choice

Assume the competing hypotheses take the following form H₀: µ₁-µ₂ = 0,H_A: µ₁-µ₂ ≠ 0,where µ₁ is the population mean for population 1 and µ₂ is the population mean for population 2.Also assume that the populations are normally distributed with known variances and we use independent sampling.Which of the following expressions is appropriate test statistic?

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