condition mean min max ZT0-3 98.889478 98.889478 98.889478 ZT4-7 76.31998 76.31998 76.31998 ZT8-11 61.555667 61.555667 61.555667 ZT12-15 61.5208025 61.5208025 61.5208025 ZT16-19 33.748706 33.748706 33.748706 ZT20-23 40.934988 40.934988 40.934988