Use the following information to answer the question. In a recent poll of 1200 randomly selected adult office workers, 32% said they had worn a Halloween costume to the office at least once.
-What is the margin of error, using a 95% confidence level, for estimating the true population proportion of adult office workers who have worn a Halloween costume to the office at least once? (Round to the nearest thousandth)
A)0.026
B)0.013
C)0.158
D)0.053

Question

Quizplus · Accepted Answer

The margin of error (ME) can be calculated using the formula for a proportion: ME = Z * sqrt[(p(1-p))/n], where Z is the Z-score for a 95% confidence level (approximately 1.96), p is the sample proportion (0.32), and n is the sample size (1200). Plugging in these values gives ME ≈ 0.026.

Use the Following Information to Answer the Question