condition mean min max ZT0-3 2931.1 2931.1 2931.1 ZT4-7 3053.8 3053.8 3053.8 ZT8-11 2977.4 2977.4 2977.4 ZT12-15 3800.0499999999997 3800.0499999999997 3800.0499999999997 ZT16-19 3431.5 3431.5 3431.5 ZT20-23 2946.2 2946.2 2946.2