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Part 1 of 5 a/2 for the 90% confidence interval X Part 2 of 5 Za/2 for the 87% confidence interval Za/2= X Part 3

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Part 1 of 5 a/2 for the 90% confidence interval X Part 2 of 5 Za/2 for the 87% confidence interval Za/2= X Part 3 of 5 Za/2 for the 95% confidence interval Za/2= X Part 4 of 5 Za/2 for the 99% confidence interval X Part 5 of 5 Za/2 for the 94% confidence interval X

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