Knowledge is measured by the score in points that the nurse receives on a test. Is this a quantitative or qualitative variable? Is it continuous or categorical? What level of measurement is it?

In a study by Vassiliadou et al. (2008), the role of nursing in sexual counseling of myocardial patients was examined. The authors examined professional nurses and collected data about their gender, age, education, unit of employment, and experience in cardiac clinics. They then compared, among other things, the knowledge and comfort level nurses had with regard to sexual counseling.