Jon- Your description of air and your definition of mixtures are good. However, we were asked why we believe that air is a mixture. In other words, we were asked for evidence. The sort of facts you cite were not discovered by reading textbooks but by doing real experiments.
Ingroup bias, sometimes known as in-group favoritism, in-groupâout-group bias or intergroup bias, refers to a pattern of favoring members of oneâs in-group over out-group members.This can be expressed in evaluation of others, allocation of resources and many other ways.ngroup bias, sometimes known as in-group favoritism, in-groupâout-group bias or intergroup bias, refers to a pattern of favoring members of oneâs in-group over out-group members.
Selection Bias Selection bias is defined as a bias when the subjects, groups or data is selected for the analysis is not randomly selected and forms a non representative sample of the given population. In other words, selection bias occurs where there is no randomization while selecting a sample and thus the selected sample is not a representative sample for the population. It is also known as selection effect. Some of the examples of selection bias are given below: