condition mean min max ZT0-3 7.861171000000001 1.063207 14.659135000000001 ZT4-7 4.846515 4.846515 4.846515 ZT8-11 1.8122369999999999 1.8122369999999999 1.8122369999999999 ZT12-15 0 0 0 ZT16-19 5.369501 5.369501 5.369501 ZT20-23 0.7877505 0.7877505 0.7877505