condition mean min max ZT0-3 95.001313 95.001313 95.001313 ZT4-7 87.88639 87.88639 87.88639 ZT8-11 53.418763999999996 53.418763999999996 53.418763999999996 ZT12-15 52.716268 52.716268 52.716268 ZT16-19 39.450025999999994 39.450025999999994 39.450025999999994 ZT20-23 35.1456525 35.1456525 35.1456525