Question: 5.11. State the z-score used in finding a confidence interval for a proportion with confidence level (a) 0.98 (b) 0.90 (c) 0.50 (d) 0.9973.

5.11. State the z-score used in finding a confidence interval for a proportion with confidence level

(a) 0.98

(b) 0.90

(c) 0.50

(d) 0.9973.

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