Identify which type of quantitative purpose statement each of the four statements below represents (experimental, correlational, quasi-experimental, or descriptive). Provide rationale to support your answers using your text book or other scholarly reference from a nursing journal.
1- The purpose of the study was to compare the effect of different time exposures to sunlight on in-vitro cultures of Acinetobacter.
2- The purpose of this study was to examine the relationships among stress, anxiety, and blood pressure in persons with a family history of strokes.
3- The purpose of the study was to compare the effects of a patient-teaching intervention with usual care in community clinic patients.
4- The purpose of the study was to explore the characteristics of health care organizations that provide subsidized care to low-income communities.