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

question 123

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 and we use independent sampling.The population variances are not known and cannot be assumed equal.Which of the following expressions is appropriate test statistic?

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