condition mean min max ZT0-3 495.75 495.75 495.75 ZT4-7 1276.3 1276.3 1276.3 ZT8-11 989.75 989.75 989.75 ZT12-15 527.55 527.55 527.55 ZT16-19 316.4 316.4 316.4 ZT20-23 291.9 291.9 291.9