A survey is conducted a term in the most common reason all people on the cell phone a company said our survey to customers between the ages total of 20 and 30 based on the responses the company concluded that people on his cell phone for messaging purposes is this conclusion valid?
No, because not all people on a cell phone, who had the same probability of being selected
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