condition mean min max ZT0-3 281.95 281.95 281.95 ZT4-7 222.9 222.9 222.9 ZT8-11 217.35000000000002 217.35000000000002 217.35000000000002 ZT12-15 294.35 294.35 294.35 ZT16-19 337.5 337.5 337.5 ZT20-23 333.6 333.6 333.6