condition mean min max ZT0-3 13.097434999999999 9.20392 16.990949999999998 ZT4-7 21.86105 21.86105 21.86105 ZT8-11 11.316849999999999 11.316849999999999 11.316849999999999 ZT12-15 0 0 0 ZT16-19 10.682055 10.682055 10.682055 ZT20-23 12.857050000000001 12.857050000000001 12.857050000000001