condition mean min max ZT0-3 23.020692 23.020692 23.020692 ZT4-7 39.4268855 39.4268855 39.4268855 ZT8-11 56.148854 56.148854 56.148854 ZT12-15 35.570041 35.570041 35.570041 ZT16-19 31.235693 31.235693 31.235693 ZT20-23 32.1152375 32.1152375 32.1152375