condition mean min max ZT0-3 372.4 372.4 372.4 ZT4-7 809.6 809.6 809.6 ZT8-11 864.2 864.2 864.2 ZT12-15 777.5999999999999 777.5999999999999 777.5999999999999 ZT16-19 640.05 640.05 640.05 ZT20-23 532.3499999999999 532.3499999999999 532.3499999999999