Outline and evaluate statistical infrequency and deviation from social norms as definitions of abnormality. Refer to the experiences of Ethan in your answer.

Ethan's Case Study

Ethan is a 24-year-old software developer who has developed an intense, consuming preoccupation with recording and cataloguing every single piece of data he generates or consumes. He spends over five hours each evening copying system logs and manual web histories into local databases, meaning he rarely sleeps more than three hours a night. In his local town, his behavior of filming his walk to the supermarket to log every license plate he passes is considered highly bizarre and has led to confrontations with local residents. Statistically, Ethan's sleep duration places him in the bottom 0.5% of the population, and his data cataloguing habits put him in the top 0.1% of the population. Ethan insists he is perfectly fine, though his work performance has begun to plummet and his manager has issued a formal warning.