A reputable polling organization in a certain country surveyed 106,300 adults, and 18% of those polled...
A reputable polling organization in a certain country surveyed 106,300 adults, and 18% of those polled reported that they smoked.
1. Calculate the margin of error for the proportion of all adults who smoke with 99% confidence.
ME = [ ]? Round to four decimals as needed
Homework Answers
Ans:
given : n=106300 p = 0.18 q= 1-p = 0.82
Margin of error = Z * Sqrt ( p ( 1 - p) / n)
Z for 99% confidence is 2.576
Margin of error = 2.576 *sqrt(0.18*0.82 / 106300 )
= 0.00303
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