condition mean min max ZT0-3 1.03859075 0.8449264999999999 1.232255 ZT4-7 3.685495 3.685495 3.685495 ZT8-11 1.14656 1.14656 1.14656 ZT12-15 0 0 0 ZT16-19 1.3679575 1.3679575 1.3679575 ZT20-23 1.778815 1.778815 1.778815