Cognitive-based therapy (CBT) and family-based therapy (FBT) are
two different treatments for anorexia. In an experimental study,
forty-six anorexic teenage girls were randomly assigned to two
groups. One group, consisting of n1 = 29 individuals, received CBT,
and the other group, consisting of n2 = 17 individuals, received
FBT. Weight of each individual is measured twice, once at the
beginning and once at the end of the study period. The variable of
interest is the weight change, i.e. weight after...