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Distribution of performance indicators of Chinese players and the players from other countries. The box and whiskers denote the maximum, minimum, median, first quartile and third quartile. The cross markers denote outliers, of which distance from the box is 1.5 times as much as the length of the interquartile range. c-o: Difference of median between two groups. *: Significantly different between groups (p < .05). **: Significantly different between groups (p < .01).
