condition mean min max ZT0-3 678.268544 678.268544 678.268544 ZT4-7 1019.5690004999999 1019.5690004999999 1019.5690004999999 ZT8-11 800.5091299999999 800.5091299999999 800.5091299999999 ZT12-15 831.9205005 831.9205005 831.9205005 ZT16-19 532.242103 532.242103 532.242103 ZT20-23 457.89978399999995 457.89978399999995 457.89978399999995