condition mean min max ZT0-3 82.5310173775 62.60659243 102.455442325 ZT4-7 267.0851368 186.0062859 348.1639877 ZT8-11 543.088930225 484.71792445000006 601.459936 ZT12-15 639.25250435 616.4356838 662.0693249000001 ZT16-19 385.667482425 330.7766345 440.55833035 ZT20-23 237.519787425 198.3432126 276.69636225