A recent poll of 120 adults who frequent the local farmer's market found that 54 have purchased reusable cloth bags for their groceries. Based on these data, what is the margin
Of error for a 95% confidence interval of the proportion of adults who have purchased
Reusable cloth bags?
A) 0.0454
B) 0.0117
C) 0.089
D) 0.075
E) 0.0432

Question

Quizplus · Accepted Answer

The margin of error for a proportion can be calculated using the formula: 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 (54/120 = 0.45), and n is the sample size (120). Calculating this gives approximately 0.089.

A Recent Poll of 120 Adults Who Frequent the Local