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

Multiple Choice

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.
$$\begin{array} { l c c } &&\text { Teenagers Favoring }\\\text { Music Type } & \text { Teenagers Surveyed } & \text { This Type } \\\text { Pop } & 800 &384 \\\text { Rap } & 900 & 450\\\end{array}$$
-Refer to Exhibit 11-9. The 95% confidence interval for the difference between the two proportions is

A) 384 to 450
B) 0.48 to 0.5
C) 0.028 to 0.068
D) -0.068 to 0.028