研究所、轉學考(插大)◆統計學題庫

5. (總分 15 分) Is a customer's preference for a cell phone affected by the age of the customer? If so, advertising might need to target a particular age group. Suppose a random sample of 500 customers aged 16 and older was selected, and their recent purchased cell phones along with their age groups were recorded, as shown in the table below.