condition mean min max ZT0-3 622.452 622.452 622.452 ZT4-7 528.4970000000001 528.4970000000001 528.4970000000001 ZT8-11 445.041 445.041 445.041 ZT12-15 464.597 464.597 464.597 ZT16-19 588.652 588.652 588.652 ZT20-23 643.5965000000001 643.5965000000001 643.5965000000001