Final answer:
Anonymity is the human rights protection demonstrated in this question. By using a numerical code on the data sheet for each participant completing a questionnaire and not listing any other identifying information, the nurse researcher ensures anonymity and protects the privacy of the participants.
Step-by-step explanation:
This is an example of anonymity, which is a human rights protection. By entering a numerical code on the data sheet for each participant completing a questionnaire and not listing any other identifying information on the questionnaire, the nurse researcher ensures that the participants remain anonymous. Anonymity protects the privacy of the participants and allows for unbiased analysis of the data collected.