Exhibit 11-7
The results of a recent poll on the preference of shoppers regarding two products are shown below.
$$\begin{array}{l}
&&\text { Shoppers Favoring }\
\text { Product } & \text { Shoppers Surveyed } & \text { This Product } \
\text { A } & 800 & 560 \
\text { B } & 900 & 612
\end{array}$$
-Refer to Exhibit 11-7. At 95% confidence, the margin of error is
A) 0.064
B) 0.044
C) 0.0225
D) 52

Question

Exhibit 11-7
The results of a recent poll on the preference of shoppers regarding two products are shown below.
 $$\begin{array}{l}
&&\text { Shoppers Favoring }\
\text { Product } & \text { Shoppers Surveyed } & \text { This Product } \
\text { A } & 800 & 560 \
\text { B } & 900 & 612
\end{array}$$
-Refer to Exhibit 11-7. At 95% confidence, the margin of error is
A) 0.064
B) 0.044
C) 0.0225
D) 52

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 the confidence level (1.96 for 95%), p is the sample proportion, and n is the sample size. Calculating for both products and comparing, the closest margin of error is 0.044.

Exhibit 11-7 the Results of a Recent Poll on the Preference

Exhibit 11-7
the Results of a Recent Poll on the Preference