condition mean min max ZT0-3 41.87 41.87 41.87 ZT4-7 84.60555554333334 84.60555554333334 84.60555554333334 ZT8-11 66.61944444333334 66.61944444333334 66.61944444333334 ZT12-15 33.00111111 33.00111111 33.00111111 ZT16-19 25.16777778 25.16777778 25.16777778 ZT20-23 33.138888890000004 33.138888890000004 33.138888890000004