condition mean min max ZT0-3 19.328400000000002 19.328400000000002 19.328400000000002 ZT4-7 4.007025 4.007025 4.007025 ZT8-11 10.350075 10.350075 10.350075 ZT12-15 32.2864 32.2864 32.2864 ZT16-19 53.892799999999994 53.892799999999994 53.892799999999994 ZT20-23 40.01275 40.01275 40.01275