condition mean min max ZT0-3 979.4726666666667 805.0125 1148.8449999999998 ZT4-7 685.513 685.513 685.513 ZT8-11 650.2875 650.2875 650.2875 ZT12-15 940.0395 893.2545 986.8245 ZT16-19 1017.315 1017.315 1017.315 ZT20-23 1157.705 1157.705 1157.705