condition mean min max ZT0-3 50.3566 50.3566 50.3566 ZT4-7 48.53805 48.53805 48.53805 ZT8-11 24.544600000000003 24.544600000000003 24.544600000000003 ZT12-15 29.7367 29.7367 29.7367 ZT16-19 38.22855 38.22855 38.22855 ZT20-23 46.2394 46.2394 46.2394