condition mean min max ZT0-3 2391.0 2391.0 2391.0 ZT4-7 2812.3 2812.3 2812.3 ZT8-11 2828.8500000000004 2828.8500000000004 2828.8500000000004 ZT12-15 2946.5 2946.5 2946.5 ZT16-19 2768.2 2768.2 2768.2 ZT20-23 2617.45 2617.45 2617.45