Sampling Bias
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Sampling bias occurs when some members of the population are systematically more likely to be selected than others.
Show
A survey on study habits recruited only from the library will overstate how much the population studies.
Watch for
A large biased sample is not safer than a small one. Size multiplies the bias rather than diluting it.