Question: How close is the confidence interval based on the more accurate normal approximation to the exact one? A more accurate normal approximation to X2

How close is the confidence interval based on the more accurate normal approximation to the exact one?

A more accurate normal approximation to X2 α is given by

x 0.5 (za + 2k - 1

where zα is the z-score that has area α to its right.

x 0.5 (za + 2k - 1

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