condition mean min max ZT0-3 10.34721 10.34721 10.34721 ZT4-7 7.0358 7.0358 7.0358 ZT8-11 5.29603 5.29603 5.29603 ZT12-15 7.7581 7.7581 7.7581 ZT16-19 14.23675 14.23675 14.23675 ZT20-23 12.8106 12.8106 12.8106