condition mean min max ZT0-3 78.533375 69.50685 87.5599 ZT4-7 16.88165 16.88165 16.88165 ZT8-11 3.9368 3.9368 3.9368 ZT12-15 0 0 0 ZT16-19 10.28912 10.28912 10.28912 ZT20-23 27.704349999999998 27.704349999999998 27.704349999999998