condition mean min max ZT0-3 60.2398 60.2398 60.2398 ZT4-7 52.88655 52.88655 52.88655 ZT8-11 45.4184 45.4184 45.4184 ZT12-15 36.727999999999994 36.727999999999994 36.727999999999994 ZT16-19 58.50235 58.50235 58.50235 ZT20-23 58.88995 58.88995 58.88995