It is believed that the proportion of patients who develop pulmonary complications after undergoing cardiac surgery is 8%. How large should the sample size for two groups (Intervention vs. Control) if an investigator wishes to detect a relative reduction of 25% in the pulmonary complication rate after implementing the preoperative intervention, assumed a power of 90% and a Type I error of 0.05?

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.