condition mean min max ZT0-3 4.20382 3.6612350000000005 4.746405 ZT4-7 24.9097 24.9097 24.9097 ZT8-11 19.6672 19.6672 19.6672 ZT12-15 0 0 0 ZT16-19 11.829685 11.829685 11.829685 ZT20-23 13.69265 13.69265 13.69265