Forty percent of the subjects dropped out of an experimental study looking at the effect of a job training program on employment for homeless women. Over 90% of the dropouts were single homeless women with at least two preschool children, while the majority of subjects successfully completing the program had no preschool children. What threat to internal validity could be present?

For each of the following, mark whether it is a possible confounder (a factor that mixes up the results, making it look like candy is to blame when it's a causal (or causation) link which supports the argument that candy causes criminal behavior (ie, explains how candy leads to criminality ), or neither (an irrelevant factor, something that may cause people to become criminals but has nothing to do with eating candy). choose your answers based only< on the information given. additives in candy- additives found in candy may adversely affect brain development of young children in ways that could contribute towards adult aggression. impulsive personality-- kids who are highly impulsive and have trouble delaying gratification are more likely to eat candy every day as children and more likely to disobey laws as adults. violent abuse-- children who suffer violent abuse are more likely to become violent adults and commit violent crimes. gender- boys are overwhelmingly more likely to commit violent crimes

One way in which the european union encourages trade among countries is through the use of

Here a fun and extra question will give brainless to the best onehow much wood could a wood chuck chuck if a wood chuck could chuck wood?