condition mean min max ZT0-3 521.35 521.35 521.35 ZT4-7 824.2 824.2 824.2 ZT8-11 660.45 660.45 660.45 ZT12-15 279.4 279.4 279.4 ZT16-19 127.0 127.0 127.0 ZT20-23 246.3 246.3 246.3