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bias - favouring one point of view.
The thing that can be done to reduce bias is sampling random things
A bias means a tendency to do things one way or to choose things one way as opposed to another. If you say something which reveals what your preference is you are expressing a bias.
Systematic sampling occurs when you have a list of people, then you select every 10th person on the list. No bias will occur as long as the order of the people on the list is not important.
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