condition mean min max ZT0-3 6.3078075 5.368105 7.24751 ZT4-7 3.208255 3.208255 3.208255 ZT8-11 3.936815 3.936815 3.936815 ZT12-15 0 0 0 ZT16-19 3.71069 3.71069 3.71069 ZT20-23 5.071915000000001 5.071915000000001 5.071915000000001