Find the margin of error for the survey results described.
-During the questioning of 82 potential jury members, 33% said that they had already formed an opinion as to the guilt of the defendant.
Give your answer as a percentage to one decimal place.
A)1.2%
B)22.1%
C)5.5%
D)11.0%

Question

Quizplus · Accepted Answer

The margin of error can be calculated using the formula for the margin of error in a proportion: ME = z * sqrt(p(1-p)/n), where z is the z-score for the desired confidence level (commonly 1.96 for 95%), p is the sample proportion (0.33), and n is the sample size (82). Calculating this gives approximately 11.0%.

Find the Margin of Error for the Survey Results Described