Final answer:
Schizophrenia is a psychological disorder that can be observed based on statistical deviation. It affects approximately 1 percent of people in the United States and is characterized by symptoms such as hallucinations, delusions, and difficulty with reality and social situations.
Step-by-step explanation:
An example of a psychological disorder that can be observed based on statistical deviation is Schizophrenia. Schizophrenia is a serious and often debilitating mental illness that affects approximately 1 percent of people in the United States. Symptoms of the disease include the inability to differentiate between reality and imagination, inappropriate and unregulated emotional responses, difficulty thinking, and problems with social situations. People with schizophrenia can suffer from hallucinations and delusions.