Define cohort panel and cross-sectional study

Panel study is a research that collects information from the same individuals at different points in time. Research conducted by panel study can either be qualitative or quantitative. An illustration of a panel investigation is the Baltimore longitudinal study of aging. The survey is a volunteer program that started in 1958 and aimed at studying how humans age. The program continued with the first volunteers in 1958. If a significant amount of women from a particular age group are found to be prevalent in the illness, then the researcher can conduct further studies to identify the cause (Watson & Roger, 2015). Identify the four levels of measurement and give an example of each There are four levels of measurements; Nominal, ordinal, interval, and ratio measures.