Evaluate the distribution for Skewness

Roger likes to buy lottery tickets regularly, and he occasionally wins. This is an example of ________

a) reinforcement. b) classical conditioning. c) operant conditioning. d) social-cognitive.

If a psychologist discovers that the blood of patients with schizophrenia contains a certain chemical not found in the general population, we can conclude that a. this chemical causes a person to develop schizophrenia. b. having schizophrenia causes this chemical to form in a person's blood. c. both schizophrenia and the chemical are caused by some unknown third factor, such asthe typical

diet in mental hospitals. d. the chemical and schizophrenia are related, but no causal relationship has been established.