condition mean min max ZT0-3 24.13 23.8001 24.459899999999998 ZT4-7 14.671999999999999 14.671999999999999 14.671999999999999 ZT8-11 6.20603 6.20603 6.20603 ZT12-15 0 0 0 ZT16-19 10.15306 10.15306 10.15306 ZT20-23 18.30925 18.30925 18.30925