condition mean min max ZT0-3 2855.7588865000002 2667.6639640000003 3043.853809 ZT4-7 1907.7860185 1888.7198635 1926.8521735 ZT8-11 1638.8009065 1627.212946 1650.3888670000001 ZT12-15 2616.52769 2151.9175084999997 3081.1378715 ZT16-19 3605.4202382500002 3535.1929135 3675.6475630000004 ZT20-23 3636.603236 3594.6751815000002 3678.5312905