condition mean min max ZT0-3 537.4 537.4 537.4 ZT4-7 402.8 402.8 402.8 ZT8-11 474.6 474.6 474.6 ZT12-15 505.29999999999995 505.29999999999995 505.29999999999995 ZT16-19 478.65 478.65 478.65 ZT20-23 513.2 513.2 513.2