The impact of outliers on the mean in the evolution of video-assisted thoracoscopic lobectomy
EUROPEAN JOURNAL OF CARDIO-THORACIC SURGERY(2017)
摘要
From a statistical standpoint, the central tendency is a distinctive feature of a population being defined by 3 parameters familiar to the investigators, i.e. the mean, the median and the mode. Another potentially significant variable to define a population is represented by the outliers, i.e. values that lie distant from the main group of observations. While the outliers tend to affect the mean by enlarging or reducing its value, the median and mode remain unchanged. The impact of the outliers on the mean is something worth studying to understand the evolution of the population of video-assisted thoracic surgery (VATS) lobectomists.
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关键词
VATS lobectomy,Thoracoscopy,Training
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