condition mean min max ZT0-3 337.36924999999997 336.6935 338.04499999999996 ZT4-7 346.8695 346.8695 346.8695 ZT8-11 400.9685 400.9685 400.9685 ZT12-15 0 0 0 ZT16-19 595.0835 595.0835 595.0835 ZT20-23 391.4745 391.4745 391.4745