This term is sometimes applied to experiment testing Bell's inequalities if the measurement efficiency is low.
This term is sometimes applied to experiment testing Bell's inequalities if the measurement efficiency is low. It is a type of false generalization and one way to avoid it is to use stratification and time-lapse techniques. It is a problem that plagues many telephone polls, and makes it impossible to conduct a scientific poll online. A subtype of it is the spotlight fallacy, making conclusions based on the subset that gets the most attention, such as using 9/11 to draw conclusions about Islam. FTP, name this statistical problem 3  encountered when the part actually studied does not represent the whole, usually because it is self-selected or selected due to prejudice.
This term is sometimes applied to experiment testing Bell's inequalities if the measurement efficiency is low.
biased sample or unrepresentative sample