condition mean min max ZT0-3 194.50583333333333 125.338 274.774 ZT4-7 241.4545 241.4545 241.4545 ZT8-11 534.035 534.035 534.035 ZT12-15 550.0045 393.124 706.885 ZT16-19 351.5935 351.5935 351.5935 ZT20-23 234.27100000000002 234.27100000000002 234.27100000000002