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 standard error for the estimate of the proportion of all American adult office workers that have worn a Halloween costume to the office? Round to the nearest ten- thousandth.
A)0.0135
B)0.4672
C)0.0143
D)0.0002

Question

Quizplus · Accepted Answer

The standard error (SE) for a proportion is calculated using the formula SE = sqrt[(p(1-p))/n], where p is the sample proportion (0.32) and n is the sample size (1200). Plugging in the values, SE = sqrt[(0.32 * 0.68) / 1200] ≈ 0.0135.

Use the Following Information to Answer the Question