Answer:
d. Are concerned about non response bias among the controls
Explanation:
Participation incentive is an extrinsic motivator, it is a reward given to encourage participation of people for a certain thing, like a research in this case.
They are particularly useful when the desire to participate in the research for the sake of participating is weak.
From the question, being concerned about no response bias among the group used as control for the research is important because they were not given incentives for them to participate, where as incentives were given to the other group of people (eligible cases)
It seems that you have missed the given options for this question, but here is the answer based on my research. How it is likely if their mother is correct and what it means for Ana's chances of getting sick again is that <span>Sam could not get sick with the same virus again since he has acquired immunity to it, so he must have a different virus which Ana could catch. Hope this answer helps.</span>
Answer:
Hello! Unfortunatly, I can't tell what the question is. Could you post another question with more accuracy? Thanks!
Explanation:
I hope this helps! Have a great rest of your day!
Answer:
the 3rd one i believe......