condition mean min max ZT0-3 226.75 226.75 226.75 ZT4-7 288.1 288.1 288.1 ZT8-11 289.5 289.5 289.5 ZT12-15 326.5 326.5 326.5 ZT16-19 294.45000000000005 294.45000000000005 294.45000000000005 ZT20-23 224.75 224.75 224.75