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96% confidence interval z score? I need z scores for 90% - 99% confidence intervals. Sign In . to add your answer. 1. Ask a Question. Related Questions. How to calculate the Confidence Interval using Z-score and vice versa? How to ... - read more

z–score is 1.96. The sample proportion is p = 513/900 = 0.57. The 95% confidence interval is then p ≈ 0.57 ... z–score for a 98% confidence interval is zr = 2.326. Thus, the confidence interval for the true proportion p is - read more

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