condition mean min max ZT0-3 562.9000000000001 562.9000000000001 562.9000000000001 ZT4-7 459.6 459.6 459.6 ZT8-11 403.9 403.9 403.9 ZT12-15 478.05 478.05 478.05 ZT16-19 441.7 441.7 441.7 ZT20-23 489.6 489.6 489.6