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? (1 point)
• No, because the sample includes customers of too many different ages.
• Yes, because the sample includes all customers between the ages of 20 and 30.
• Yes, because the sample includes male and female customers.
• No, because not all people who own a cell phone have the same probability of being selected.
The correct answer is:
• No, because not all people who own a cell phone have the same probability of being selected.