If you are doing market research, you can analyze the following directions. The first is to distinguish between men and women. Compared with girls, boys have a higher proportion of fitness. Then list the reasons for men and women to exercise, and then list the needs behind each reason. You can delete questions that you think are not relevant.

The second is to study the grade to see if the fitness rate of that grade will be higher and what is the reason behind it. Here, we should plan the question-and-answer ratio of each grade, and the number of questions and answers should not be too small, so as not to affect the accuracy of the data.

3. What are the reasons why most people in different grades are unwilling to exercise? Multiple choices can be made to find out the positive related factors and solutions.

The accuracy of our questionnaire can be preliminarily investigated and tested. We should select about 20 people in each grade, and try not to interview crowded people, because this will affect the singularity of data. Twenty people in each grade will ask and answer questions, improve supplementary questions, and delete low-related or false propositions, and finally form a more convincing questionnaire demand analysis.