condition mean min max ZT0-3 478.25 478.25 478.25 ZT4-7 489.7 489.7 489.7 ZT8-11 445.9 445.9 445.9 ZT12-15 412.04999999999995 412.04999999999995 412.04999999999995 ZT16-19 379.6 379.6 379.6 ZT20-23 505.65 505.65 505.65