A survey is conducted to determine the most common reason people own a cell phone. A company sent out a survey to customers between the ages of 20 and 30. Based on the responses, the company concluded that people own a cell phone for messaging purposes. Is this conclusion valid?
A. Yes, because the sample includes all customers between the ages of 20 and 30.
B. No, because the sample includes customers of too many different ages.
C. No, because not all people who own a cell phone have the same probability of being selected.
D. Yes, because the sample includes male and female customers.
C. No, because not all people who own a cell phone have the same probability of being selected.
C. No, because not all people who own a cell phone have the same probability of being selected.
The conclusion is not necessarily valid because the sample only includes customers between the ages of 20 and 30. This age group may not represent the overall population of cell phone owners. Additionally, there may be other reasons people own a cell phone that were not considered in the survey.