condition mean min max ZT0-3 1532.6 1532.6 1532.6 ZT4-7 1239.4 1239.4 1239.4 ZT8-11 1184.4 1184.4 1184.4 ZT12-15 901.3499999999999 901.3499999999999 901.3499999999999 ZT16-19 1086.1 1086.1 1086.1 ZT20-23 1494.1 1494.1 1494.1