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

question 94

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 that the observations in the two samples are independent.The population variances are not known but are assumed equal.Which of the following expressions is appropriate test statistic?

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