Tolong jelaskan mengenai Non-responses dari Sampling (statistika) dalam bahasa sunda

In survey sampling, many of the individuals identified as part of the sample may be unwilling to participate or impossible to contact. In this case, there is a risk of differences, between (say) the willing and unwilling, léading to bias in conclusions. This is often

addressed by follow-up studies which maké a repéated attempt to contact the unresponsive and to characterise their similarities and differences with the rest of the frame.