The contents of the questionnaire cover letter mainly include

The contents of the questionnaire cover letter mainly include the following aspects: the identity of the investigator, the purpose of the investigation, the contents of the investigation, the choice of the respondents, the confidentiality measures and the matters needing attention in the investigation.

1. Identity of the investigator: clearly indicate the identity of the investigator, such as the name of the investigation unit or organization and the contact information of the investigator.

2. Purpose of the survey: briefly explain the purpose and significance of the survey, explain the importance of the survey and how the survey results will be used.

3. Survey content: summarize the main contents of the survey and explain the topics or problem areas involved in the survey.

4. Selection of respondents: explain how to select respondents, including the source and selection method of samples, to ensure the representativeness and reliability of samples.

5. Security measures: emphasize the confidentiality of survey results and participants' information, ensure the anonymity of participants, and explain how to ensure the security of data.

6. Matters needing attention in the investigation: provide a description of the investigation, including how to answer questions, the time limit for filling out the questionnaire and how to submit the questionnaire.

The purpose of the questionnaire

1. data collection: collect data about a specific topic or problem, which can be used for analysis, reporting and decision-making.

2. Investigation and analysis: Collect survey data through questionnaires, so as to deeply analyze a phenomenon, a problem or a crowd.

3. Market research: Understand consumers' needs, preferences and buying behaviors, and provide market information for enterprises to support decision-making.

4. Evaluation and monitoring: Conduct questionnaires regularly to evaluate the effectiveness of projects, services or policies, and make necessary adjustments and improvements.

5. Educational research: collect data in the field of education to understand the needs of learners, the allocation of educational resources or the effectiveness of educational policies.

6. Social investigation: to understand social phenomena, public opinions and attitudes, and provide basis for social policy formulation and public management.