Online polls where people opt-in are subject to
- A
No bias
- B
Sampling variability only
- C
Confounding
- Dcheck_circle
Voluntary response bias
Explanation
Opt-in respondents tend to feel more strongly than the general population.
AP Statistics· difficulty 2/5
Online polls where people opt-in are subject to
No bias
Sampling variability only
Confounding
Voluntary response bias
Explanation
Opt-in respondents tend to feel more strongly than the general population.
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