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A table of Z scores for confidence intervals 90%, 95%, 99%. Use a standard normal table...

A table of Z scores for confidence intervals 90%, 95%, 99%. Use a standard normal table to practice determining z-scores for: 1- 50% two-sided confidence interval

2- 80% upper confidence interval

3- 70% upper confidence interval

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Answer #1

Solution : - At 50% Confidence interual for 2. x = 1-0.50 = 0.50 ą - 0.50 - 0.25 24 220.25 a 0.67 — Using 2-table . 2 2. At 8

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