condition mean min max ZT0-3 800.0999999999999 800.0999999999999 800.0999999999999 ZT4-7 836.2 836.2 836.2 ZT8-11 681.3499999999999 681.3499999999999 681.3499999999999 ZT12-15 570.1 570.1 570.1 ZT16-19 523.2 523.2 523.2 ZT20-23 642.25 642.25 642.25