condition mean min max ZT0-3 1082.6999999999998 1082.6999999999998 1082.6999999999998 ZT4-7 1372.6 1372.6 1372.6 ZT8-11 1228.3 1228.3 1228.3 ZT12-15 1029.2 1029.2 1029.2 ZT16-19 1057.9 1057.9 1057.9 ZT20-23 1061.2 1061.2 1061.2