Exhibit 11-9
The results of a recent poll on the preference of teenagers regarding the types of music they listen to are shown below.

-Refer to Exhibit 11-9. The standard error of is
A)0.48
B)0.50
C)0.03
D)0.0243

Question

Exhibit 11-9
The results of a recent poll on the preference of teenagers regarding the types of music they listen to are shown below.
 
-Refer to Exhibit 11-9. The standard error of  is
A)0.48 
B)0.50 
C)0.03 
D)0.0243

Quizplus · Accepted Answer

To calculate the standard error, we use the formula:
SE = sqrt[(p*(1-p))/n]
Where p is the proportion of teenagers who prefer rock music, which is 0.27 in this case, and n is the sample size, which is 225. 
Plugging in the values, we get:
SE = sqrt[(0.27*(1-0.27))/225]
SE = 0.0243
Therefore, the standard error of the proportion of teenagers who prefer rock music is 0.0243. Thus, the best choice is D.

Exhibit 11-9 the Results of a Recent Poll on the Preference of Preference