condition mean min max ZT0-3 220.652 220.652 220.652 ZT4-7 206.562 206.562 206.562 ZT8-11 194.199 194.199 194.199 ZT12-15 190.75 190.75 190.75 ZT16-19 219.59300000000002 219.59300000000002 219.59300000000002 ZT20-23 231.013 231.013 231.013