Suggested Research Method/Why

For my semester 2 project, I am going to hand out a questionnaire to a group of teenagers, middle-aged adults, and adults over the age of 65. I am going to ask them a number of true/false question, multiple choice, and free response questions. Some of the questions I have thought of so far are: "Do you feel like you have ever been treated wrongly because of your age, how?" "What do you think the best age is?" "How do you feel about the age you are now?"