condition mean min max ZT0-3 38.08356666666667 25.268099999999997 44.6516 ZT4-7 18.3841 18.3841 18.3841 ZT8-11 16.0337 16.0337 16.0337 ZT12-15 20.652075 17.96855 23.3356 ZT16-19 25.2982 25.2982 25.2982 ZT20-23 41.14305 41.14305 41.14305