condition mean min max ZT0-3 46.602 37.52365 55.13475 ZT4-7 24.09685 24.09685 24.09685 ZT8-11 45.3157 45.3157 45.3157 ZT12-15 50.457875 43.61565 57.3001 ZT16-19 33.117000000000004 33.117000000000004 33.117000000000004 ZT20-23 50.8727 50.8727 50.8727