Assume the Competing Hypotheses Take the Following Form H₀: µ₁

question 96

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, the variances are known, and independent sampling is used. Which of the following expressions is the appropriate test statistic?

• A) t_df =
• B) t_df =
• C) z =
• D) t_df =

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