If n = 160 and ˆ p = 0.9, construct a 90% confidence interval.
Added by Ameena S.
Step 1
Given: n = 160 ˆp = 0.9 z = 1.645 (from z-table for 90% confidence level) Margin of error = z * sqrt(ˆp * (1-ˆp) / n) Margin of error = 1.645 * sqrt(0.9 * 0.1 / 160) Margin of error = 1.645 * sqrt(0.09 / 160) Margin of error = 1.645 * sqrt(0.0005625) Margin of Show more…
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