Question

1. scientists use ____________ to analyze the data they gather from their studies.
2. sigmund freud developed psychoanalytic theory largely on the basis of ____________
3. the correlation between the need for achievement and salaries is a ____________
4. correlation describes relationships, but it does not reveal ____________

Explanation:

1. Statistics is a common tool for data - analysis in scientific studies.
2. Sigmund Freud developed psychoanalytic theory based on case studies of his patients.
3. The correlation between need for achievement and salaries can be positive, negative or zero. Positive is a common finding as higher achievement - motivation may lead to higher - paying jobs.
4. Correlation only shows an association, not causation.

Answer:

1. Statistics
2. Case studies
3. Positive correlation (could also be negative or zero in some cases)
4. Causation