<PRE><B>Question 1112728</B>
B)  standard error(SE) = square root(0.714 * (1-0.714)/350) = 0.024
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alpha(a) = 1 - (90/100) = 0.10
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critical probability(p*) = 1 - (a/2) = 0.95
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critical value(CV) is the z-score corresponding to p*, CV = 1.645
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margin of error(ME) = CV * SE = 1.645 * 0.024 = 0.0395 approximately 0.040
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90% confidence interval is 0.714 + or - 0.040 or (0.674, 0.754)
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