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

question 48

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 point estimate for the difference between the proportions is

• A) -0.02
• B) 0.048
• C) 100
• D) 66

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Definitions:

Voluntary Response Sample

A sample which consists of individuals who choose themselves to participate in a survey, often leading to bias and unrepresentative samples.

Contingency Table

A Contingency Table is a statistical tool used to analyze the relationship between two or more variables, presenting the frequency distribution in a matrix format.

Response Rate

The percentage of people who respond to a certain call-to-action out of the total number of people who were asked to take the action.

Rate of Return

A measure of the gain or loss on an investment over a specified period, typically expressed as a percentage of the investment's cost.