(Solution) - Omar collects data from two populations Sahar uses those data -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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Omar collects data from two populations. Sahar uses those data to construct a (two-sided) 90% confidence interval for µ1 - µ2 and gets (- 12.5, - 3.7). At the same time, Miguel uses the data to test H0: µ1 = µ2 versus HA: µ1 < µ2 with ? = 0.05. Can we tell from the information if Miguel rejects H0? Explain your reasoning.