condition mean min max ZT0-3 2.86368 1.60234 3.906285 ZT4-7 2.041865 2.041865 2.041865 ZT8-11 1.921785 1.921785 1.921785 ZT12-15 4.1250725 4.058535 4.19161 ZT16-19 4.357245 4.357245 4.357245 ZT20-23 3.8336250000000005 3.8336250000000005 3.8336250000000005