condition mean min max ZT0-3 369.1 369.1 369.1 ZT4-7 476.9 476.9 476.9 ZT8-11 499.7 499.7 499.7 ZT12-15 541.15 541.15 541.15 ZT16-19 454.65000000000003 454.65000000000003 454.65000000000003 ZT20-23 391.75 391.75 391.75