The collection method may exclude groups, time periods, devices, or behaviors in a non-random way. Reweighting can help only when the missing structure is understood and relevant examples exist.
Sampling bias occurs when collected data systematically differs from the population or situations a model is expected to handle.
The collection method may exclude groups, time periods, devices, or behaviors in a non-random way. Reweighting can help only when the missing structure is understood and relevant examples exist.