A survey Is conducted to determine the most common reason people on 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 a messaging purposes it is this conclusion with your answer be no because not all people who own a cell phone had the same probability of being selected or no because the sample includes customers are too many different ages or yes, because the sample includes male and female customers or yes, because the sample includes all customers between the ages of 20 and 30