Mathematics, 11.12.2019 21:31, MiddleSchool2005

Arandom sample of 49 measurements from a population with population standard deviation σ1 = 4 had a sample mean of x1 = 9. an independent random sample of 64 measurements from a second population with population standard deviation σ2 = 5 had a sample mean of x2 = 12. test the claim that the population means are different. use level of significance 0.01. find a 99% confidence interval for μ1 − μ2.

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Arandom sample of 49 measurements from a population with population standard deviation σ1 = 4 had a...