condition mean min max ZT0-3 33.891975 24.086199999999998 43.69775 ZT4-7 36.65065 36.65065 36.65065 ZT8-11 92.4384 92.4384 92.4384 ZT12-15 0 0 0 ZT16-19 122.43620000000001 122.43620000000001 122.43620000000001 ZT20-23 68.7265 68.7265 68.7265