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O Oxza/2(0/) A 100(1-a)% confidence interval for the population mean u based on a sample of size n with a sample mean x and

O Oxza/2(0/) A 100(1-a)% confidence interval for the population mean u based on a sample of size n with a sample mean x and a known population standard deviation o is given by Za xz/2(n-1))

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