A researcher is interested in describing the survival rates of patients who had a cardiac arrest prior to admission. Which component is missing?

The research design refers to the overall strategy that outlines how the research will be conducted, including identifying the type of study (e.g., observational, experimental). While important, this component does not specifically detail how the data will be analyzed, which is necessary for assessing survival rates.

Data collection involves gathering the necessary information for the study, such as patient demographics and clinical outcomes. While essential for obtaining the data, it does not address how the data will be analyzed to describe survival rates, which is where the analysis plan plays a crucial role.

The study sample refers to the group of patients included in the research. While it is vital to define the sample for the study, knowing the sample alone does not provide a framework for analyzing survival rates. The analysis plan is what ensures the results from the sample can be appropriately interpreted.