Explanation:

Mailed questionnaire method is a popular data collection method used in survey research. In this method, the researcher sends a set of questions to the respondents through mail, and they are expected to fill and return it. However, this method is known to have a high non-response rate. The following are the reasons why the non-response rate is maximum in this method:

1. Lack of interest: Many respondents do not have an interest in the subject matter of the survey, and hence they do not respond to the questionnaire.

2. Time-consuming: Filling out a questionnaire can be time-consuming, and busy respondents may not have the time to do it.

3. Lack of incentives: Respondents may not have any motivation to respond to the questionnaire, especially if there are no incentives attached to it.

4. Incomplete or inaccurate addresses: If the researcher does not have accurate addresses of the respondents, they may not receive the questionnaire, or it may be returned to the researcher as undeliverable.

5. Social desirability bias: Respondents may not want to provide honest answers to sensitive questions, and hence they may choose not to respond.

Conclusion:

Mailed questionnaire method is a convenient and cost-effective data collection method, but it is not without its limitations. The high non-response rate is one of the major challenges associated with this method. Researchers can take steps to minimize non-response by using incentives, providing clear instructions, and following up with non-respondents.

There is a chance that many people may not respond to mails