condition mean min max ZT0-3 28.950283281666668 27.076375810000002 30.824190753333333 ZT4-7 35.80259402 23.56799345 48.03719459 ZT8-11 21.904857394666667 12.599762202666666 31.209952586666667 ZT12-15 19.900094171166664 15.811036832333333 23.98915151 ZT16-19 16.970968658 12.369836575999999 21.57210074 ZT20-23 10.941440440000001 10.52247423 11.36040665