condition mean min max ZT0-3 257.1 257.1 257.1 ZT4-7 301.3 301.3 301.3 ZT8-11 309.20000000000005 309.20000000000005 309.20000000000005 ZT12-15 321.5 321.5 321.5 ZT16-19 270.6 270.6 270.6 ZT20-23 270.8 270.8 270.8