condition mean min max ZT0-3 466.65 466.65 466.65 ZT4-7 912.3 912.3 912.3 ZT8-11 1024.4 1024.4 1024.4 ZT12-15 752.5999999999999 752.5999999999999 752.5999999999999 ZT16-19 769.7 769.7 769.7 ZT20-23 422.2 422.2 422.2