condition mean min max ZT0-3 26.1138 23.243450000000003 28.98415 ZT4-7 46.9706 46.9706 46.9706 ZT8-11 51.935 51.935 51.935 ZT12-15 0 0 0 ZT16-19 36.2294 36.2294 36.2294 ZT20-23 25.24465 25.24465 25.24465