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Calculate the 99% confidence interval for the difference (mu1-mu2) of two population means given the following...

Calculate the 99% confidence interval for the difference (mu1-mu2) of two population means given the following sampling results. Population 1: sample size = 12, sample mean = 20.36, sample standard deviation = 0.57. Population 2: sample size = 7, sample mean = 16.32, sample standard deviation = 0.85.

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